1834 Amphibious Combat Vehicle Crew Marine

The AAV7A1 served the Marine Corps for decades. The Amphibious Combat Vehicle is what replaces it. The ACV swims faster, shoots farther, and survives more. MOS 1834 puts you in the crew seat of the Marine Corps’ next-generation ship-to-shore connector, and the mission stays exactly the same: get infantry from the ship to the beach while keeping them alive.

This is a combat arms MOS. The 1834 Amphibious Combat Vehicle Crew Marine operates a wheeled armored vehicle that carries up to 13 combat-equipped Marines across open water and into the fight. The Mk 38 Mod 2 25mm chain gun is a significant step up from the AAV’s .50 cal. The vehicle is heavier, taller, and handles differently both in the water and on land. Joining this community means joining a field that is still actively being built out.

The ACV program is in full-rate production and fielding. Marines in 1834 operate alongside legacy 1833-coded crewmembers at many units during the transition. MOS 1833 covers the AAV crew path and is addressed separately.

Job Role and Responsibilities

MOS 1834 Amphibious Combat Vehicle Crew Marine is the Marine Corps enlisted crew position for the BAE Systems ACV 1.1 and follow-on ACV variants. Crewmembers operate and maintain a wheeled amphibious combat vehicle that transports up to 13 combat-equipped Marines from ship to shore, provides fire support with the Mk 38 Mod 2 25mm chain gun and 7.62mm coaxial machine gun, and supports mechanized operations ashore. The crew works as a three-person team: driver, gunner, and vehicle commander.

The daily work of a 1834 Marine falls into four areas.

Vehicle operation and maintenance. The ACV is a modern wheeled armored vehicle with more sophisticated electronics, fire control, and survivability systems than the AAV it replaces. Crewmembers conduct daily preventive maintenance checks and services (PMCS), monitor onboard diagnostics, and perform scheduled maintenance on the drivetrain, hull systems, waterjet propulsion, and electronic systems. The wheeled design makes road movement faster than the legacy tracked AAV, but it introduces different maintenance demands around tire and wheel systems, and the waterjet propulsion system requires its own maintenance discipline.

Gunnery and weapons systems. The Mk 38 Mod 2 chain gun is a significant capability upgrade. The gunner trains to operate the remote weapon station and stabilized fire control system, which includes ballistic computation and targeting electronics. Crewmembers also maintain proficiency on secondary weapons and manual backup systems.

Amphibious operations. The ACV swims at higher speeds than the legacy AAV and has improved surf performance. Because the vehicle is heavier and sits higher in the water, the entry and exit procedures differ from what 1833 Marines train on. Crewmembers train on water launch and recovery operations, emergency egress from a flooded vehicle, ramp procedures, and crew-to-infantry communication during water crossings. The Mk 38 gun system requires different safety protocols during water operations than the AAV’s older weapons configuration.

Mounted tactical movement. Once ashore, the ACV supports mechanized maneuver alongside infantry units. Crewmembers conduct convoy operations, establish vehicle security positions, and execute tactical tasks as part of a combined arms team. The ACV’s protected mobility and 25mm firepower make it a more capable direct combat platform than the AAV.

MOS Codes in OccFld 18

The 1834 field is the current fielding edge of OccFld 18. As ACV production continues, more billets in amphibious assault battalions will convert from 1833 to 1834. New accessions may receive 1834 and go directly to ACV training, or may receive additional legacy AAV familiarization depending on unit equipment status at their first duty station.

Equipment

The primary platform is the BAE Systems ACV 1.1. Key systems include:

• Mk 38 Mod 2 25mm machine gun system with stabilized remote weapon station
• 7.62mm M240 coaxial machine gun
• AN/VRC-92 SINCGARS radio and enhanced communications suite
• Blue Force Tracker (BFT) and digital situational awareness systems
• Waterjet propulsion system for water operations
• Fire suppression system and survivability package

Salary and Benefits

Pay for a new 1834 Marine starts at E-1 or E-2 depending on prior qualifying education. Most Marines reach E-4 (Corporal) during their first enlistment. At E-4 with less than two years of service, base pay is $3,142.20 per month. Combined with BAH and BAS, total compensation at an E-4 level at a location like Camp Pendleton or Camp Lejeune typically exceeds what most comparable civilian hourly roles pay in the same markets.

Source: DFAS 2026 pay tables. Figures reflect the 2026 pay raise.

Base pay is subject to federal income tax. The allowances below are not.

Special pays are not attached to 1834 at accession, but hostile fire pay ($225/month) and hardship duty pay apply during qualifying deployments. Marines serving in Okinawa on UDP orders receive Overseas Housing Allowance and Cost of Living Allowance in addition to their standard pay.

All active-duty Marines receive TRICARE Prime at no cost. Coverage includes medical, dental, vision, mental health, prescriptions, and hospitalization. Family members enrolled under the sponsor pay no enrollment fee and no in-network copays, with an annual catastrophic cap protecting the household from major medical expenses. This is one of the most financially significant benefits of active-duty service because the equivalent civilian health plan for a family costs thousands of dollars per year.

Marine Corps Tuition Assistance covers up to $4,500 per year and $250 per semester hour for courses taken while on active duty. The Post-9/11 GI Bill pays full in-state tuition at public schools or up to $29,920.95 per academic year at private schools after qualifying service, plus a monthly housing stipend and up to $1,000 per year in book allowances. Marines who take evening or online classes using Tuition Assistance during their enlistment can complete significant degree progress before they separate, reducing how much GI Bill they need post-service.

Marines earn 30 days of paid leave per year at 2.5 days per month, with a maximum carryover of 60 days. Scheduling leave during the work-up period before a MEU deployment can be challenging, so planning ahead is important.

The Blended Retirement System (BRS) provides a pension worth 40% of your high-36 average basic pay at 20 years, TSP matching up to 5% of basic pay starting in year three, and a continuation pay bonus option between years eight and twelve. Marines who leave before 20 years retain their TSP savings and any GI Bill benefit remaining.

Qualifications and Eligibility

The Mechanical Maintenance (MM) composite draws on Arithmetic Reasoning (AR), Mechanical Comprehension (MC), Auto and Shop Information (AS), and Electronics Information (EI). Marines who score well here typically have comfort with mechanical systems, basic electronics, and hands-on problem solving. The MM 100 floor is consistent across both 1833 and 1834.

If you score below MM 100 on your first ASVAB attempt, you can retest after a waiting period. Focus your preparation specifically on the four MM subtests rather than studying for the full exam equally. Review the ASVAB preparation guide before your test date. The PiCAT option lets you take an unproctored prescreen before the proctored MEPS verification test, which helps identify score gaps before the stakes matter.

Application and Selection

The path to 1834 runs through a Marine Corps recruiter and MEPS. You take the ASVAB, complete a physical, and receive a job offer based on your scores, available billets, and the Marine Corps’ current accession needs. No formal selection board exists for 1834 at accession. A clean background, strong MM score, and available 18-field billets determine your chances.

The ACV program is still in full-rate production, which means the Marine Corps is actively building out the 1834 community. Billet availability in this field has been growing relative to legacy 1833 slots. First-term Marines who ship in the near term may have better odds of a confirmed 1834 contract than they would have had three or four years ago when the platform was newer and fewer slots existed.

Marines enter service as Private (E-1). Standard active-duty enlistment is four years. Some three-year options exist. Service obligation begins on the date of initial entry into active duty.

Work Environment

Daily Environment

The 1834 Marine’s daily environment centers on the motor pool, training ranges, the ship, and the field. At home station, mornings typically begin with vehicle checks and scheduled maintenance. Training days include gunnery events, amphibious exercises, and combined arms training with the infantry units the ACV supports.

Shipboard time is a significant part of the deployment cycle. During a Marine Expeditionary Unit (MEU) float, ACV crews live aboard amphibious ships and conduct daily drills, maintenance, and training while at sea. The well deck environment and the confined berthing spaces that go with it are not for people who need space and quiet.

The crew structure is tight. Driver, gunner, and vehicle commander are interdependent in a way that makes individual performance immediately visible. Vehicle readiness reflects on the whole crew. There is no invisible coasting in a three-person team where each person’s work touches the other two every day.

The chain of command runs from vehicle commander through section commander, platoon commander, and company headquarters. Platoons typically have multiple sections of vehicles operating in close coordination. Performance evaluation for E-4 and below uses proficiency and conduct marks in the Unit Diary. Staff Noncommissioned Officers at E-6 and above receive FITREPs. Strong performance requires consistent vehicle readiness, gunnery qualifications, and demonstrated crew leadership.

The ACV community is newer than the AAV community, which means the institutional culture is still being built. Marines who join early in a platform’s lifecycle can shape standards, contribute to emerging tactics, and build a professional identity on something that will serve the force for decades.

Training and Skill Development

Initial Training Pipeline

Boot Camp is 13 weeks covering recruit transformation, drill, rifle qualification, and Marine Corps values. After Boot Camp, all non-infantry Marines attend the 29-day Marine Combat Training (MCT) course at SOI-West or SOI-East, which covers small-unit tactics, live-fire, and combat first aid.

The ACV Crew Course at Camp Pendleton’s Amphibious Vehicle Training Branch is where the 1834 MOS is built. The course covers ACV vehicle systems, waterjet operation, water launch and recovery procedures, Mk 38 chain gun gunnery and qualification, radio procedures, and tactical employment. The ACV’s more sophisticated fire control and digital systems make this course somewhat more technically demanding than the legacy AAV crewman course. After graduation, Marines report to an Assault Amphibious Vehicle Battalion (AAV Bn) or Amphibious Combat Vehicle Battalion equipped with ACVs. Initial fleet time focuses on crew certification and working up for the next MEU or deployment cycle.

Advanced Training

After fleet assignment, ACV crewmembers work toward crew chief qualification and gunnery certification.

Advanced opportunities include:

• Crew Chief Qualification - earned at the fleet level through demonstrated proficiency in maintenance, gunnery, and amphibious operations
• Master Gunner Course - available to senior NCOs and SNCOs; develops gunnery expertise and crew training qualification
• ACV Instructor billets at the Amphibious Vehicle Training Branch at Camp Pendleton following a successful first enlistment
• Digital systems and fire control familiarization - unit-level qualification for the Mk 38 remote weapon station and associated electronics
• Joint and interagency amphibious exercises - experienced ACV crews may participate in large-scale exercises with Navy amphibious forces

The Marine Corps supports education through Marine Corps Institute (MCI) correspondence courses, Tuition Assistance, and the Marine Corps University distance education program.

Career Progression and Advancement

Rank Progression

Senior 1834 Marines typically serve as vehicle commanders, section leaders, and platoon sergeants. Gunnery Sergeants manage platoon readiness and training. Master Sergeants and above serve in staff and advisory roles focused on ACV tactics, maintenance programs, and training standards. Because the ACV community is still relatively new, senior 1834 Marines play an outsized role in developing the institutional knowledge that will define the MOS for the next generation of crewmembers.

Promotion from E-4 upward is competitive. The composite score, drawing on FITREP averages, time in grade, time in service, rifle score, PFT score, and education points, determines placement on promotion lists. In a small, technically demanding MOS, peer competition for promotion slots is intense. Marines who maintain first-class PFT scores, earn crew chief qualification early, and take on additional responsibilities in gunnery or maintenance training tend to separate themselves from peers at promotion board time.

The Lateral Move (LATMOVE) program allows Marines to request a change of MOS after completing a first enlistment. Marines in other fields can request a LATMOVE into 1834 if billets are available and they meet the MM 100 line score requirement. Marines already in the 1833 field who want to convert to 1834 may receive priority consideration as the Marine Corps manages the transition away from legacy AAV platforms.

Success in the long-term career track in 1834 requires consistent gunnery qualification, reliable vehicle maintenance records, and demonstrated performance as a crew chief before competing for Sergeant. Marines who treat the Mk 38 gunnery qualification as the professional standard it is, rather than a checkbox, build a reputation that follows them through their career.

Physical Demands and Medical Evaluations

Operating the ACV is physically demanding. The vehicle has better crew ergonomics than the legacy AAV, but the job still involves climbing on and off an armored hull, working in confined spaces during maintenance, handling heavy ammunition and equipment, and operating under noise and vibration during exercises and deployments. The ACV is heavier and sits higher than the AAV, which changes the physical requirements for mounting, dismounting, and external maintenance work.

Daily physical demands include:

• Mounting and dismounting the vehicle hull
• Carrying and loading 25mm and 7.62mm ammunition
• Performing maintenance in tight spaces around the hull, suspension, and engine compartment
• Working in heat, cold, and rain during field exercises
• Managing physical and mental stress during extended water operations

PFT and CFT Standards (2026)

Marines must pass both the PFT and CFT annually. Substandard scores affect promotion eligibility and re-enlistment options. In a combat arms field like 1834, physical readiness is treated as operational readiness, not an administrative requirement.

Medical evaluations beyond initial accession include annual periodic health assessments and pre-deployment medical and dental screening. Hearing protection is mandatory during vehicle operations and gunnery. Long-term noise exposure is a documented occupational hazard. Marines with significant hearing loss may face reclassification.

Deployment and Duty Stations

Primary Duty Stations

Camp Pendleton and Camp Lejeune host the bulk of ACV-equipped units. As fielding progresses, additional billets at forward locations may open. The transition timeline means unit equipment status can vary, and your first duty station may still operate a mix of ACV and legacy AAV platforms.

Deployment Tempo

MOS 1834 follows the same MEU rotation cycle as 1833. MEU deployments run 6-7 months on average, with a 12-18 month work-up cycle before each float. The work-up includes gunnery qualification, amphibious exercises, and combined arms training events. Marine Expeditionary Units operate in the Pacific, Mediterranean, and other theaters depending on global demand.

Unit Deployment Program (UDP) rotations to Okinawa are separate from MEU floats and provide additional deployment time for Pacific-based units. Marines in 1834 should plan for two to three deployments during a standard four-year enlistment if assigned to an active MEU-cycle unit.

Risk, Safety, and Legal Considerations

Amphibious vehicle operations involve genuine risk. That is part of the job description.

Water operations. The ACV swims faster than the AAV and has better survivability features, but open-ocean operations still carry risk from weather, mechanical failure, and sea state. The vehicle’s increased weight and higher center of gravity, compared to the AAV, mean water entry and exit procedures are different and require precise execution. Crewmembers must maintain swimming qualifications and complete emergency egress training for submerged vehicle scenarios. The ACV’s survivability improvements address known vulnerabilities in the legacy fleet, but water operations remain the highest-risk phase of crew service.

Ballistic and fire risk. The 25mm gun system and associated ammunition require strict safety protocols for loading, transporting, and firing. The Mk 38 remote weapon station adds electronic components to the safety equation. Violations carry UCMJ consequences.

Rollover and collision. The wheeled ACV handles differently than tracked vehicles, particularly at speed on paved roads. Training addresses vehicle handling limits, speed restrictions, and convoy safety procedures specific to the wheeled platform.

Noise and vibration. Extended ACV operation exposes crewmembers to engine noise and weapons noise. Hearing protection is required during all operations. Long-term hearing damage is a known occupational hazard.

No security clearance is required for 1834 at accession. Standard service obligation is four years. Marines are subject to the UCMJ throughout service. Deployments to conflict zones include pre-deployment legal briefings, rules-of-engagement training, and law-of-armed-conflict instruction.

Maintenance accountability is a legal matter in addition to a tactical one. Signing off on PMCS checks that were not completed, or falsifying vehicle readiness status, constitutes a UCMJ violation. The ACV’s electronic diagnostics provide more documentation of vehicle condition than the legacy AAV did, which means maintenance shortcuts are more detectable. Marines who build honest maintenance habits from day one avoid the legal exposure that corners-cutting eventually creates.

Impact on Family and Personal Life

Duty Station Life

Camp Pendleton and Camp Lejeune are well-established base communities with off-base housing, schools, and family support infrastructure. BAH rates at both locations allow most married Marines to live off-base. Both communities have decades of experience supporting Marine families through the MEU deployment cycle, which means the school systems, the housing market, and the civilian employers near these bases all understand and accommodate military schedules better than most locations.

MEU deployments mean 6-7 months away from home plus additional time during work-up exercises. Families receive deployment support through the Marine Corps Family Team Building (MCFTB) program, family readiness groups, and Military OneSource, which provides free counseling, financial planning, and transition resources around the clock. The work-up period before a MEU is demanding on families in a different way than the deployment itself. Short field exercises, gunnery qualifications, and amphibious training events create weeks of shorter separations that accumulate. Families who build strong local support networks before the work-up begins manage this period better than those who are still finding their footing.

Okinawa UDP rotations add another dimension. If your unit deploys to Okinawa under UDP orders, accompanied tours are sometimes available for longer rotations. Unaccompanied tours mean 7-9 months of separation. Families remaining stateside during an Okinawa UDP have access to the same MCFTB and Military OneSource resources.

PCS moves happen every two to three years on average. Moving costs are covered through the Dislocation Allowance and the Personally Procured Move (PPM) program. Families who plan their housing search and school enrollment early tend to transition more smoothly than those who wait until arrival orders are cut at the last minute.

Marine Corps Reserve

MOS 1834 is available in the Marine Corps Reserve, but access depends on whether Reserve units at your location have ACV equipment. The Reserve amphibious vehicle community is geographically concentrated. Not all states have Reserve AAV or ACV-equipped battalions. Confirm with a recruiter before treating Reserve 1834 as a local option.

Active Duty vs. Marine Corps Reserve: 1834 Comparison

Reserve drill weekends in this MOS include vehicle maintenance, gunnery refresher training, and unit readiness events. Vehicle crew communities require more training time than standard Reserve schedules due to platform certification and water operations recurrency requirements. Reserve 1834 Marines who do not maintain water operations recurrency may be limited in what amphibious training they can participate in, which reduces their value to the unit and limits their professional development in the most operationally significant aspects of the MOS.

The ACV is a newer platform than the AAV, and Reserve units are receiving ACV equipment on a rolling basis. A Reserve 1834 Marine assigned to a unit still operating legacy AAVs may need to complete additional ACV familiarization training when the unit converts. Confirm the equipment status of any Reserve unit you are considering before committing.

USERRA protects Reserve Marines from employment discrimination due to military service. During any period of active-duty mobilization under Title 10 orders, Reserve Marines receive the same pay and benefits as active-duty Marines for the duration of those orders. The Employer Support of the Guard and Reserve (ESGR) program provides ombudsman assistance when employer conflicts arise over Reserve service obligations.

Post-Service Opportunities

The 1834 MOS builds skills that transfer in several civilian directions, particularly in mechanics, vehicle operations, law enforcement, and defense contracting.

Civilian Career Crosswalk

Defense contractor roles tied to the ACV program, BAE Systems, and other armored vehicle programs value former crew Marines who understand the platform from the operator’s side. Contractors supporting the ACV program specifically need people who know how the vehicle actually performs in water operations and under gunnery conditions, and that experience is difficult to hire from outside the military community. Government positions with Marine Corps Systems Command or other acquisition programs are available to experienced NCOs and SNCOs who want to stay connected to defense programs without remaining in uniform.

Law enforcement is a common post-service path for Marines in combat arms fields. The weapons proficiency, attention to detail, and ability to perform under stress that characterize the 1834 MOS translate directly to what law enforcement agencies look for in candidates. Federal agencies including the Border Patrol and Bureau of Prisons also actively recruit from the military veteran pool.

The Transition Readiness Program (TRP) at the unit level helps separating Marines prepare resumes, practice interviews, and enroll in VA benefits. Marines who begin the TRP process 12-18 months before their estimated separation date rather than in the final weeks have significantly better outcomes. The Post-9/11 GI Bill covers college or vocational training after service. Veterans with service-connected conditions can access additional support through the VA’s Vocational Rehabilitation and Employment (VR&E) program, which can fund training in new fields beyond what the GI Bill alone covers.

Is This a Good Job for You? The Right (and Wrong) Fit

Good fit if:

• You want a combat arms role on a modern platform with real firepower and an amphibious mission
• You are mechanically minded and interested in vehicle systems, electronics, and maintenance
• You thrive in a small crew environment where performance is visible and accountability is immediate
• You are comfortable with water operations and the physical demands of an armored vehicle crew
• You want a career that puts you on a ship, in the field, and in the middle of amphibious operations

Poor fit if:

• You prefer a stable schedule, predictable hours, or an office-based work environment
• You are not comfortable with the risks of open-ocean vehicle operations
• You want a MOS that transfers cleanly to a licensed civilian trade without additional training
• You are not prepared for multiple long deployments across a four-year enlistment

The ACV community is growing as the Marine Corps completes the transition from the legacy AAV. Marines entering 1834 today are building professional identity on a platform that will serve the force for decades. That is both an opportunity and a commitment. The community is small, the standards are high, and weak performers are visible quickly.

The question to ask yourself before pursuing this MOS is not whether you want to ride an armored vehicle or fire a 25mm gun. Those experiences are real but they are a fraction of the actual job. The majority of a 1833 or 1834 career is maintenance, PMCS, gunnery training, and the daily work of keeping a complex machine ready to perform. Marines who find that grind satisfying tend to stay. Marines who are looking for something more glamorous tend to be disappointed by year two.

For comparison, Marines who want a mechanized combat role with a longer operational history and a clearer civilian skills pathway should read the 1833 Assault Amphibious Vehicle Crewmember profile alongside this one to understand how the two platforms and career tracks currently differ.

This site is not affiliated with the U.S. Marine Corps or any government agency. Verify all information with official Marine Corps sources before making enlistment or career decisions.

More Information

Contact a Marine Corps recruiter or visit your nearest Marine Corps Recruiting Station (RSS) to confirm current 1834 billet availability, ACV school dates, and enlistment options. Current accession requirements are published by the Marine Corps Recruiting Command at mcrc.marines.mil.

Explore more OccFld 18 Tank, Assault Amphibious Vehicle, and Amphibious Combat Vehicle careers including the 1833 Assault Amphibious Vehicle Crewmember.

Need score context? Review the ASVAB guide and the PiCAT guide before publishing permanent MOS content.