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GME4

Gunner's Mate

E-4 (Specialist/Corporal) · Coast Guard

E1–E3E-4E-5E-6E-7E8–E9
HEADS UP

GM3 is when the accountability record becomes yours. Your name is in the 'signature of armory PO' column now, not the 'supervised access' column — and every entry you sign on that log is a professional statement about whether the system is correct. The Servicewide Exam bibliography for GM2 is also real now; start the study calendar before the gunnery schedule crowds out every other priority.

The Honest MOS Read
GM3 is the first rated paygrade in the Gunner's Mate career, and the transition from striker to GM3 is steeper than most non-rates expect. At A-School you learned the principles; at the unit you apply them to a live armory, a real ammunition inventory, a pyrotechnic magazine that the District inspector will audit, and a crew of twenty to sixty people who need to qualify on weapons systems before they stand force-protection watches. The GM2 or GM1 above you is the technical authority, but you are the day-to-day armory petty officer for routine evolutions and you are accountable for every log entry you make. The daily work is less glamorous than the recruiting materials suggest. You clean weapons systems after exercises. You conduct serial-number inventories of the small-arms locker at the start and end of each armory access evolution. You verify pyrotechnic lot numbers against the inventory log before and after every handling event. You fill out the maintenance record for every cleaning, lubrication, and inspection you perform. This documentation work is not overhead — it IS the job. When the District weapons inspector or the Area weapons staff arrives for an inspection, the maintenance log is what they read, and the log tells them whether the armory is professionally managed or informally managed. Informal armory management in the Coast Guard is a serious finding. On a cutter, you are also a force-protection team member. The AT/FP mission is the operational context that justifies the GM rating's existence, and at GM3 you are qualifying into the force-protection team, standing gunnery watches during High-Value Asset escorts, and running the gunnery training evolutions that keep the cutter's crew qualified. On a Sentinel-class FRC this may mean you are the most junior GM in a two- or three-person shop and you are doing the armory work and the force-protection team work with minimal overhead — direct action from the first day back from A-School. The crew small-arms qualification program is one of the clearest expressions of the GM3's role. On a cutter with forty crew members, approximately thirty of them need to qualify on the M9/M17 pistol and the M4 carbine every qualification cycle. You set up the range, brief the safety rules to the crew, run the relay schedule, score the targets, handle the range documentation, and submit the qualification records that the armory log and the sector readiness report will track. You are running this program under GM2 supervision, but the range runs on your execution. A range with a safety incident is a career-defining event. A range that runs cleanly, produces accurate qualification records, and adds up to a current-qualified crew is the record the GM1 reads. The Servicewide Exam for GM2 is now a real planning item. The GM rating is a competitive advancement community and the SWE bibliography is weighted toward COMDTINST M8000.1, COMDTINST M8300.1, and the AT/FP program — which means the GM3 who has been living in those pubs since A-School is already building the study foundation. Do not wait until the year before SWE season to start; the GM3 who builds two full study cycles before the first SWE attempt is the one who makes competitive scores.
Career Arc
  • 01A-School graduation and first GM3 assignment: report to platform, begin armory petty officer qualification under GM2 supervision, study the unit's Ordnance Manual compliance record.
  • 02Month 3-6: Armory petty officer qualification signed; standing routine armory watch evolutions with log accountability; running first supervised crew small-arms qualification range element.
  • 03Month 6-12: Lead first complete small-arms qualification range evolution end-to-end under GM2 oversight; pyrotechnic inventory qualification signed; AT/FP force-protection team member qualification completed.
  • 04Year 1-2: SWE study cycle built and first SWE attempted; crew-served weapons operator qualification (Mk 38 or M2 .50 cal depending on platform) in progress or completed; EER marks tracking with positive GM1 input.
  • 05Year 2-3: GM2 SWE competitive score achieved; EER marks building toward advancement; gunnery C-school or armorer course slot requested through the GM1; GM2 selectee list published.
Common Screwups
  • ×Accountability discrepancy that does not get reported immediately — a serial number that does not match, an ammunition lot number that is off by one, a pyrotechnic count that comes up short during the inventory. The discrepancy that gets reported the moment it surfaces is a five-minute paperwork resolution. The discrepancy that gets discovered on the next inventory, because the GM3 hoped it would work out, is a formal investigation and the armory log traces directly back to whoever signed the entries.
  • ×Unauthorized maintenance on a crew-served weapon — performing a component repair or a parts replacement on the Mk 38, M2, or M240B that exceeds your organizational-level authorization without routing it through the GM1 and logging it. The weapons officer and the XO are notified for out-of-authorization maintenance; the maintenance that goes undocumented is the maintenance that fails during the next gunnery exercise and becomes a mishap report.
  • ×SWE neglect — skipping the study cycle because the gunnery schedule is packed and 'there will be time later.' Two missed SWE cycles with no competitive score is how the GM3 is still a GM3 when the junior GM who studied last year pins GM2.
  • ×Range safety shortcut — rushing a safety brief, skipping a relay check, or allowing a crew member on the firing line without the correct protective equipment because the range is running behind schedule. One safety incident on a range you are running is an investigation with your name at the top of the initial report.

A Day in the Life

  • 0530Muster and accountability check. Review the day's armory access log for the previous watch, verify the duty section's weapons status report if one is due.
  • 0600-0700Unit PT. As a rated petty officer you are now responsible for your own fitness maintenance and for setting the example to the seamen in the shop.
  • 0730Division quarters; weapons officer or department head reads the day's plan of the week. GM3 gets the armory schedule for the day — range prep, maintenance period, inventory, or crew qualification evolution.
  • 0800-1000Armory maintenance period if scheduled. Serial-number check on the inventory, maintenance log review, scheduled cleaning or lubrication on whichever weapon systems are on the maintenance schedule. Everything logged as completed.
  • 1000-1130SWE study block if not on an active armory evolution — or, if a range day, range setup: target frames, target scoring materials, relay schedule, safety brief rehearsal.
  • 1130-1300Lunch. Underway this fits around the watch rotation; in garrison the mess deck or off-base if liberty standard permits.
  • 1300-1500Crew small-arms qual range if scheduled — safety brief, run relays, score targets, document results. If not a range day: pyrotechnic inventory (count against log, verify lot expiration dates), AT/FP drill participation if scheduled.
  • 1500-1600Post-evolution documentation. Range qualification records into the armory log. Maintenance records updated for any weapons cleaned or inspected. End-of-day armory close-out entry with serial-number verification.
  • 1600Knock-off call unless on duty. Duty-section GM3 stays on the watch rotation.
  • 1700-2200Personal time. SWE study in the evening — 30 to 45 minutes a day through COMDTINST M8000.1 chapters is a sustainable pace that builds full coverage across a study cycle.

Weekly Cadence

The weekly rhythm at GM3 is structured around the armory schedule and the gunnery training calendar. Monday is the administrative reset — maintenance log review, ammunition accountability check, any discrepancies from the weekend watch period resolved before the work week opens. The GM1 or GM2 reviews the armory log Monday morning and any entry that looks wrong gets explained before 1000. Tuesday through Thursday are the execution days. Range days, maintenance periods, pyrotechnic inventories, and crew qualification evolutions land in this window. On a cutter with a port call this week, the AT/FP posture may be elevated, which means the gunnery watch rotation is active and the force-protection team is at readiness. On a cutter at anchor or pier-side in home port, the maintenance schedule runs clean and the SWE study window opens in the afternoons. Friday is the close-out day. The plan of the week for next week is being drafted by the GM1 and the weapons officer; the GM3 provides the armory schedule inputs — which weapons systems are due for maintenance, which crew members need qualification, what pyrotechnic inventory actions are due. The GM3 who provides these inputs accurately and on time is the one the GM1 trusts to run the armory program independently. The GM3 who waits for the GM1 to tell them what is due is the one who is still being managed.

Key Skills — How to Drill Each

  1. 01
    Issue, receive, and account for small arms and crew-served weapons per COMDTINST M8000.1 armory accountability procedures — every serial number logged, every round counted.
    Before every armory access evolution, do a physical serial number verification against the armory log — do not assume the previous entry was correct. After every evolution, do the same check before you sign the close-out entry. The two-minute serial-number check at close-out is what turns a discrepancy into a same-day resolution instead of a command investigation, and the GM1 reads the log to see if this step is being performed.
  2. 02
    Perform field-level maintenance on the unit's small-arms inventory — M9/M17, M4, M240B, M2 .50 cal — to COMDTINST M8000.1 and applicable weapons manual standards.
    Build a maintenance schedule for each weapon system the unit fields and keep it current in the maintenance record. When you perform a cleaning or lubrication, log the date, the action, the condition found, and the condition left in the weapons record. A maintenance record that reads 'cleaned, lubed, function-checked, no deficiencies noted' for each weapon in the armory is the record the District weapons inspector wants to see. One weapon with a four-month gap in the maintenance log is the finding that generates a discrepancy report.
  3. 03
    Operate the 25mm Mk 38 or M2 .50 cal as a crew-served gunner during gunnery exercises — loading, unloading, misfire procedures, clearing malfunctions.
    Study the operator section of the applicable weapons manual before your first gunnery qualification. Know the loading sequence, the immediate-action malfunction drills, and the misfire procedure cold before you touch the weapon in an exercise environment. The GM1 does not have time to walk you through misfire procedures when the weapon has failed to fire during a live-fire event — you need to already know what the next step is and execute it without prompting.
  4. 04
    Conduct a cutter crew small-arms qualification training evolution — range setup, safety brief, relay scheduling, target scoring, documentation.
    Write the range plan before the range day, not the morning of. The plan should include the relay schedule, the safety brief outline, the qualification standard each crew member must meet, the administrative procedures for documenting results, and the emergency action plan for a range safety incident. The GM2 reviews the plan; the execution is yours. A range that runs cleanly against a written plan is the range the safety officer signs off on without a comment.
  5. 05
    Handle and inventory pyrotechnic signals per COMDTINST M8300.1 series — no improvised storage, no handling outside approved procedures.
    Every pyrotechnic handling evolution starts with a count that matches the inventory log and ends with a count that matches the post-handling entry. Know the lot-expiration dates for every pyrotechnic in the magazine and build an expiration-tracking system in the armory log so that expired devices surface on the calendar, not during an inspection. The pyrotechnic inventory is an audit item and the GM3 who can walk an inspector through the lot log without hesitation is the GM3 the inspector notes positively in the report.
  6. 06
    Train non-rates on armory procedures, PQS items, and force-protection watch bill items under the GM1's standard.
    When you sign a seaman's PQS line, you are making a professional statement that this person can execute the item correctly and safely. Do not sign a line because the striker is enthusiastic or because they seem to understand it — make them demonstrate the procedure to your standard, then sign it. The GM1 reads the PQS entries and knows which GM3 signs quickly and which GM3 makes the striker demonstrate. Be the second kind.

Manuals & References — What Chapters Matter

  • COMDTINST M8000.1 (series) — Coast Guard Ordnance Manual
    Own this publication. The armory accountability, weapons maintenance, gunnery training, ammunition handling, and pyrotechnic program procedures that you will execute every day originate here. The SWE bibliography is weighted toward this document and the District weapons inspector quotes it when writing findings. Know the accountability chapters and the maintenance procedures cold.
  • COMDTINST M8300.1 (series) — Coast Guard Pyrotechnic Manual
    Governs pyrotechnic handling, storage, inventory, and disposal — and the GM3 who does not know this pub is the GM3 the GM1 does not trust near the magazine. The lot-tracking requirement, the quantity-distance tables, and the storage-space entry procedures are the items the District inspector reads against your log. Know them before your first pyrotechnic inventory.
  • COMDTINST M5580.1 — Anti-Terrorism/Force Protection Program
    The AT/FP mission drives a significant portion of your daily and operational role at GM3. The FPCON procedures, the boarding-support gunnery requirements, the force-protection team qualification standards, and the High-Value Asset escort protocols all trace back to this instruction. Know the FPCON-level actions that apply to your platform before you qualify as a force-protection team member.
  • COMDTINST M1000-series — Personnel Manual, advancement sections
    The SWE process, the EER framework, and the advancement timeline for GM2 are in the Personnel Manual. Pull the current ALCGENL advancement message for the GM rating SWE when SWE season opens — the bibliography is the test document and the cut score from the most recent GM2 cycle tells you what you are competing against.
  • Current CGPSC small-arms qualification standards and ALCGENL advancement messages for the GM rating
    The qualification standards published in current CGPSC guidance govern the crew small-arms program you are running. The advancement messages for the GM rating give you the SWE bibliography and the cut-score context. Pull both before each qualification cycle and each SWE season — they update and the version you read last year may not match the standard you are being tested against.
  • Applicable crew-served weapons operator and maintenance manuals for the systems your platform fields
    For the Mk 38 25mm, M2HB .50 cal, and M240B 7.62mm, the technical manual is the maintenance authority and the operator procedures document. COMDTINST M8000.1 references the applicable TM for each system; the TM tells you what you are authorized to do and what must be routed to intermediate-level maintenance. Know the difference before you touch the weapon.

Standards — How to Hit Each

  • Armory petty officer qualification signed; AT/FP force-protection team-member qualification complete per unit mission posture.
    Pursue both qualifications simultaneously after reporting from A-School — they reinforce each other. The armory petty officer qual runs through the unit's armory PQS and the supervisor's evaluation; the force-protection team-member qual runs through the unit AT/FP training program and the weapons officer's certification. The GM3 who delays either qual because the gunnery schedule is busy is the GM3 with gaps in the EER when the GM1 writes the promotion input.
  • Small-arms qualification current on all issued weapons per current CGPSC qualification-cycle standards — M9/M17, M4, and any crew-served system the platform fields.
    Keep a personal qualification tracking sheet separate from the unit's crew tracking system — one that shows your last qualification date and the next due date for each weapon system. When the next range date approaches, verify your qualification status before the plan of the week is published. The GM3 who discovers they are unqualified the day before the AT/FP drill is a liability on the watchbill, not a resource.
  • Coast Guard PFT passed every cycle per current personnel manual standards; weight and body composition compliant with COMDTINST M1020.8.
    The GM community is small and the GMC and GM1 know the fitness status of the petty officers in the shop. A GM3 who is consistently borderline on PFT is a petty officer who needs more attention, not more time in the armory. Build a year-round PT schedule that keeps the PFT results consistently above the minimum.
  • Servicewide Exam preparation in motion for GM2 — bibliography pulled, study schedule built.
    The SWE bibliography for the GM rating is published in the ALCGENL advancement message. Pull it the day the message drops, identify the publications listed, and build a weekly study schedule that gets through each publication at least once before the exam window. The GM3 who studies from the bibliography for two full SWE cycles has a cumulative knowledge base that a peer who crammed for one cycle does not. Start building it now.
  • EER blocks clean and trending upward; zero armory discrepancies or accountability findings on your watch.
    Every EER period, have a conversation with the GM1 before the input deadline: what did the period look like, what needs to be on the record, and what is the honest read on the trend. Do not wait for the input to be written to find out where you stand. The EER narrative that reflects consistent, concrete performance — ranges run cleanly, maintenance records current, no accountability discrepancies — is the EER narrative that advances you.

Technical Mistakes — Concrete Consequences

  • Signing out a weapon without verifying the serial number against the armory log — even when the crew member is standing there and the boat is getting underway right now.
    The discrepancy surfaced during the next inventory traces to the armory entry the GM3 signed without verifying. The investigation begins with the log, which shows the GM3's name, the time, and the weapon that went out without serial-number confirmation. That is a formal finding with the GM3's name on the initial report, regardless of whether the weapon comes back.
  • Conducting a barrel change or a component-level repair on a crew-served weapon without GM2 authorization and without logging it in the maintenance record.
    Unauthorized maintenance on an ordnance system is a reportable event under COMDTINST M8000.1. The weapons officer and the XO are notified when an out-of-authorization maintenance action is discovered, and 'I did not realize it was out of scope' is not a mitigating response — it is a demonstration that the GM3 did not understand the maintenance authorization limits of their paygrade.
  • Storing pyrotechnics in an unapproved space because the approved magazine is inconvenient right now.
    COMDTINST M8300.1 storage requirements exist because improperly stored pyrotechnics have started fires on vessels. The inspector who finds pyrotechnics outside the approved magazine space does not ask whether it was 'just temporarily there.' The finding is immediate and it closes the magazine for re-inspection before the cutter leaves port.
  • Skipping the SWE study cycle because the gunnery schedule is packed.
    Two missed SWE cycles with no competitive score is how a GM3 is still a GM3 when the person who reported to A-School the same cycle pins GM2. The SWE does not care about operational tempo. Build the study schedule and protect it the same way you protect the maintenance log — it is a professional requirement, not an elective.
  • Posting unit armory layout, weapons inventory, or gunnery exercise photos on social media.
    Weapons system configuration, armory layout, and force-protection posture are OPSEC-sensitive under the unit's AT/FP plan and the broader Coast Guard OPSEC program. The AT/FP staff reviews social media and a GM3 who posts armory content creates a command-level OPSEC investigation. The finding goes in the service record and the OIC of the unit has to notify the Sector commander.

Career Decisions at This Rank

  • GM2 SWE: first attempt vs. waiting for a more competitive preparation cycle.
    The first SWE attempt matters for the record even if the score is not competitive, because it establishes a baseline and demonstrates to the GM1 that you are engaged in the advancement process. Take the first SWE attempt. Do not wait for a 'perfect preparation cycle' — it does not exist in an active operational billet. The GM3 with one non-competitive SWE score and a strong preparation plan for the next cycle is ahead of the GM3 who has no SWE scores at all. The EER input from the GM1 notes whether you are taking the SWE, not just whether you are scoring competitively.
  • Gunnery C-school or technical armorer course: request now or after GM2 advancement.
    If a C-school slot becomes available through the GM1 and the platform resources it, take it. Technical C-schools on crew-served weapons systems or armorer certification courses build the record and the skill base that the GM2 SWE and the GM2 billet require. The GM3 who has a crew-served weapons technical course on the record is a more competitive GM2 candidate than one who has the same operational time without the training credential. Ask the GM1 what C-school slots are available in the next rotation.
  • Platform preference for next assignment: FRC, WMEC, WMSL, or sector shore billet.
    At GM3, the platform experience shapes what C-schools and technical qualifications you accumulate. An FRC assignment gives you the broadest operational exposure with the least overhead — you are the GM in the shop for day-to-day evolutions. A WMEC or WMSL gives you more complex weapons systems and a more structured weapons department that builds technical depth. A sector shore billet gives you a broader scope of the armory program across multiple subordinate units and builds administrative skill. Talk to the GM1 about the assignment picture before you submit preferences; the GM rating force manager (the rating force master chief) communicates the distribution needs through the GM1 chain.
  • Re-enlistment: standard obligation vs. career-focused re-up with assignment preference.
    The re-enlistment window at GM3 is typically the first one after A-School, and the assignment preference leverage is real at this point — the detailer has a interest in retaining a rated GM3 and may be willing to negotiate the next assignment preference in exchange for an extended obligation. If the GM path is the right one for you and you have a target assignment in mind (a specific platform type or geographic preference), this is the window to negotiate. Talk to the GM1 and the career counselor before the obligation window closes.

How the Seat Varies by Unit Type

  • Sentinel-class FRC (154-ft Fast Response Cutter)
    Small crew of approximately 24; typically one GM1 or GM2 and one GM3. You are the primary armory petty officer for day-to-day operations from day one. M2 .50 cal stations, M240B, M9/M17 and M4 for the crew. High operational tempo (patrol cycle is active); gunnery exercises happen regularly. The force-protection team is small and you are a meaningful member of it immediately.
  • Famous-class WMEC (270-ft Medium Endurance Cutter)
    Crew of approximately 100; weapons department has two to three GMs plus the weapons officer. The Mk 38 25mm Mod 2 on the 270-footers means you are maintaining a more complex system than the FRC. The larger crew means the small-arms qualification program is a bigger administrative and range-execution challenge. The WMEC's drug-interdiction and fisheries-enforcement mission keeps the AT/FP posture active on every patrol.
  • Bertholf-class WMSL (National Security Cutter)
    Crew of approximately 150; the weapons department includes the weapons officer, multiple GMs, and a structured maintenance program for the 57mm Mk 110, the 25mm Mk 38 Mod 2, multiple .50 cal M2 stations, and the full small-arms inventory. As a GM3 you are in the most technically demanding weapons environment in the CG fleet. INDOPACOM deployments and sustained high-FPCON patrols; the weapons culture is serious and the documentation standards are high.
  • Sector Command GM billet
    Shore-based; the GM program manages the sector's weapons inventory and supports the patrol boat fleet's AT/FP program. Less underway time, more structured schedule. Good for SWE study and administrative skill-building. The armory is larger in scope — serial numbers across multiple patrol boats, pyrotechnic inventory for the sector fleet — and the documentation challenge is broader than a single cutter assignment.

What Good Looks Like at This Rank

The good GM3 is the petty officer the GM1 trusts to run the small-arms qual range with a crew of twenty without a safety officer having to hover over every relay. The range plan is written the day before. The safety brief is crisp and covers everything the crew needs before they step to the firing line. The relay schedule runs on time. The score sheets match the targets. The qualification records go into the armory log the same day, not three days later when the GM1 asks where they are. There are no safety incidents because the rules were brief correctly and enforced consistently. In the armory, this petty officer's maintenance log reads like a technical record, not a compliance check. Every entry has the date, the action, the condition found, and the condition left. No weapon in the armory has a maintenance gap longer than the authorized interval. The pyrotechnic inventory count matches the log at the start and end of every evolution. Serial numbers are verified before sign-out and after sign-in, every time, without being reminded. What the GM1 says about this petty officer in the EER input is: 'Capable of running the full armory program independently and producing documentation that survives audit.' That is a strong statement for a GM3. The GM3 who earns it is the one who never lets the accountability shortcut happen — not when the boat is getting underway in twenty minutes, not when the OIC is standing at the armory hatch waiting, not when the GM2 is somewhere else. The armory log stays accurate because this petty officer made it accurate. That is the standard.

Preview — The Next Rank

GM2 — Petty Officer Second Class — is when you become the mid-level technical authority in the armory. At GM3 the GM2 checks your work; at GM2 you are checking the GM3's work and writing EER inputs on the petty officers below you. That shift from evaluated to evaluator is the central change at the GM2 rank, and it happens whether you are ready for it or not the day the advancement order publishes. At GM2 you own a significant slice of the unit's Ordnance Manual compliance program — not just the daily log entries, but the maintenance schedule, the qualification tracking, the pyrotechnic inventory program, and the discrepancy log the GM1 reviews weekly. On an FRC this may mean you are the primary GM for nearly everything, with the GM1 providing oversight and the CO reviewing your recommendations. On a WMEC or WMSL you are the mid-level technical lead managing GM3s and non-rates while the GM1 manages the program at the weapons-officer level. The SWE for GM1 is now the real planning item — and the bibliography for GM1 is larger and more detailed than the GM2 bibliography. Start reading ahead. The GM2 who enters the GM1 SWE cycle with a complete second read of COMDTINST M8000.1 already behind them is ahead of every peer who waited until the bibliography dropped.
FAQ

GM E4 — Frequently Asked Questions

Q01What does a E4 GM (Gunner's Mate) actually do?
You came back from TRACEN Yorktown with the GM rating badge and reported to a cutter — probably a Sentinel-class FRC, a Famous-class WMEC, or a Bertholf-class WMSL — or a sector command as a working GM3.
Q02What's the most important thing to know as a E4 GM?
GM3 is when the accountability record becomes yours.
Q03What does a typical day look like for a E4 GM?
Time-blocked day at the E4 GM rank tier: 0530 Muster and accountability check. Review the day's armory access log for the previous watch, verify the duty section's weapons status report if one is due, 0600-0700 Unit PT. As a rated petty officer you are now responsible for your own fitness maintenance and for setting the example to the seamen in the shop, 0730 Division quarters; weapons officer or department head reads the day's plan of the week. GM3 gets the armory schedule for the day — range prep, maintenance period, inventory, or crew qualification evolution,…
Q04What mistakes get E4 GM soldiers fired or relieved?
Accountability discrepancy that does not get reported immediately — a serial number that does not match, an ammunition lot number that is off by one, a pyrotechnic count that comes up short during the inventory. The discrepancy that gets reported the moment it surfaces is a five-minute paperwork resolution. The discrepancy that gets discovered on the next inventory, because the GM3 hoped it would work out,…
Q05What career decisions matter most at the E4 GM rank tier?
GM2 SWE: first attempt vs. waiting for a more competitive preparation cycle — The first SWE attempt matters for the record even if the score is not competitive, because it establishes a baseline and demonstrates to the GM1 that you are engaged in the advancement process. Take the first SWE attempt. Do not wait for a 'perfect preparation cycle' — it does not exist in an active operational billet. The GM3 with one non-competitive SWE score and a strong preparation plan for the next cycle is ahead of the GM3 who has no SWE scores at all.…
Q06What's next after E4 for a GM (Gunner's Mate) in the Coast Guard?
GM2 — Petty Officer Second Class — is when you become the mid-level technical authority in the armory.
Q07What manuals and regulations does a E4 GM need to know cold?
COMDTINST M8000.1 (series) — Coast Guard Ordnance Manual; own this. The armory accountability, maintenance, and gunnery training procedures that run through your billet every day originate here.; COMDTINST M8300.1 (series) — Coast Guard Pyrotechnic Manual; pyrotechnic handling, storage, and inventory accountability are in this pub and the GM3 who does not know it is the GM3 the GM1 does not trust near the magazine.; COMDTINST M5580.1 — Anti-Terrorism/Force Protection Program;…

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Published by the Honest MOS Editorial DeskVerified against DoD/.gov sourcesUpdated May 2026Editorial standards