- Side
- Israel
The M4/M4A1 carbine was supplied to the IDF during the 2023 Israel-Hamas War as wartime replenishment for infantry units.
Role detailsInfantry Weapons
M4/M4A1 carbine
Also known as
- M4 carbine
- M4A1 carbine
- M4
- M4A1
- Carbine, 5.56 mm, M4
- Carbine, 5.56 mm, M4A1
The M4/M4A1 carbine is a U.S.-origin 5.56mm service-rifle family built around a shorter M16 lineage, a collapsible stock, and modular accessory mounting. Conflict-specific evidence documents M4-family use by U.S. forces in Iraq and Afghanistan, coalition and Iraqi partner forces during anti-ISIS operations, Philippine Marines at Marawi, Israeli wartime replenishment, and Ukrainian special-operations transition from Soviet-pattern rifles during the 2014 Russia-Ukraine War.
Role in Conflicts
- Side
- Philippine government forces
- Role in conflict
- Urban infantry small arms
U.S.-donated M4 carbines were prioritized for Philippine Marines and government troops operating in Marawi during the 2017 urban battle.
U.S. Army infantrymen carried M4 carbines during dismounted security patrols in Baghdad in 2008 while deployed in support of Multi-National Division-Baghdad and Operation Iraqi Freedom.
Role details- Role in conflict
- Coalition individual-weapons readiness
Coalition forces fielded M4 carbines for individual-weapons readiness and range operations in northeast Syria during the continuing 2014 Operation Inherent Resolve mission.
- Side
- Ukraine
Ukrainian special-operations personnel reported receiving U.S.-made M4A1 carbines within weeks of Russia's February 2022 full-scale invasion and later using M4-family rifles on combat missions.
Role details
U.S. Army infantry personnel fired M4 carbines during partnered marksmanship training at Tactical Base Gamberi in eastern Afghanistan in 2015, within the Resolute Support and Freedom's Sentinel phase of the war.
Role details- Role in conflict
- Counterterrorism partner-force rifle training
Iraqi Counter-Terrorism Service soldiers used M4 rifles during coalition-supported advanced training near Baghdad in November 2016 as part of building partner capacity against ISIL.
Profile / Specs
Profile
- Origin
- United States
- Built by
- Colt
- Type
- Carbine
- Service note
- Cold War to present
- Designer
- Colt's Manufacturing Company
- Designed
- 1980s
- Unit cost
- Varies by contract and configuration
- Produced
- 1987-present
- Number built
- Millions produced across the M4 family
Specifications
- Caliber
- 5.56x45mm NATO
- Length
- 29.75 in closed; 33 in open
- M4 weight
- 7.75 lb with sling and loaded magazine
- M4A1 weight
- 8.63 lb with sling and loaded magazine
- Rate of fire
- 700-970 rpm
- Barrel length
- 14.5 in
- Accessory mounting
- M203A2 grenade launcher, M320A1 grenade launcher, or M26 Modular Accessory Shotgun System
M4 and M4A1 Configuration
PEO Soldier treats the M4/M4A1 as a 5.56 mm carbine family and describes the Army's Product Improvement Program as a conversion path from fielded M4 carbines to M4A1 configuration.
| Configuration | Reader-relevant distinction | Source-backed context |
|---|---|---|
| M4 | Baseline compact carbine | Compact M16A2-derived 5.56 mm carbine with collapsible stock, rail system, and backup iron sight. |
| M4A1 | Product-improved carbine | Adds fully automatic capability and an ambidextrous fire-control selector; PIP conversions add a heavy barrel, automatic-capable trigger mechanism, and ambidextrous fire-control assembly. |
Ammunition Fired
Official U.S. Army and PEO Soldier references identify the M4/M4A1 as a 5.56 mm carbine, linking it to the cataloged 5.56x45mm NATO cartridge family.
| Ammunition | Ammunition type | Firing evidence |
|---|---|---|
 | Small-arms cartridge | The M4/M4A1 carbine is documented as a 5.56 mm weapon, and the operator manual covers the M4 and M4A1 in the 5.56 mm rifle/carbine family. Sources: U.S. Army M4 and M4A1 operator manual, PEO Soldier M4/M4A1 Carbine |
Mounted Launchers
PEO Soldier identifies under-barrel and modular accessory options that can be mounted on the M4/M4A1 platform.
| Carried item | Item type | Carriage evidence |
|---|---|---|
 | Under-barrel grenade launcher | PEO Soldier states that the M4/M4A1 can be mounted with the M203A2 grenade launcher, documenting a direct rifle-and-launcher relationship for the cataloged M203 family. Sources: PEO Soldier M4/M4A1 Carbine |
Timeline
M4/M4A1 carbine Key Events
Army selects M4A1 fleet direction
The U.S. Army decided to update its service-rifle inventory from a mix of M16A2/A4 rifles and M4 carbines toward 5.56 mm M4A1 carbines.
Sources: PEO Soldier M4/M4A1 Carbine
M4A1 pure fleet target
PEO Soldier described FY22 as the planned point for achieving an M4A1 pure fleet through the Product Improvement Program and new production.
Sources: PEO Soldier M4/M4A1 Carbine
Media
M4/M4A1 carbine Images
Related Weapon Systems
Sources
PEO Soldier M4/M4A1 CarbinePublisher: Program Executive Office Soldier | Note: Supports M4/M4A1 family background, variant distinctions, PIP timeline, weights, barrel length, and documented accessory mounts. | Accessed: 2026-06-29U.S. Army M4 and M4A1 operator manualPublisher: U.S. Army | Note: Supports M4/M4A1 carbine specifications, operating characteristics, and background context. | Accessed: 2026-06-20Colt M4 CarbinePublisher: Colt's Manufacturing Company LLC | Note: Supports Colt manufacturer background and M4 carbine product background. | Accessed: 2026-06-20Israel to receive Colt M4A1 carbines in $12.9m. dealPublisher: The Jerusalem Post | Note: 2023 Israel-Hamas War direct conflict-use and supply context: M4A1 carbines were supplied to the IDF during the 2023 Israel-Hamas War. | Accessed: 2026-06-20Gov't troops in Marawi to receive new weapons, equipment from USPublisher: GMA News | Note: 2017 Battle of Marawi direct-use context: M4 carbines were supplied to Philippine government forces and would be used by priority troops in Marawi. | Accessed: 2026-06-21New weapons from US to be used by PH Marines in MarawiPublisher: Inquirer.net | Note: 2017 Battle of Marawi direct-use context: U.S.-donated M4 carbines were supplied to Philippine Marines and reported as used by troops operating in Marawi City. | Accessed: 2026-06-21Crazy Horse Soldiers Dismount for Streets of Baghdad Al-JididaPublisher: Defense Visual Information Distribution Service | Note: 2003 Iraq War direct-use context: a U.S. Army infantryman used the light attached to his M4 carbine during a dismounted security patrol in Baghdad while deployed in support of Multi-National Division-Baghdad and Operation Iraqi Freedom. | Accessed: 2026-06-29Coalition Forces Conduct Range Operations with M4 CarbinePublisher: Defense Visual Information Distribution Service | Note: Supports 2014 War Against the Islamic State direct conflict use under Operation Inherent Resolve: 2014 Operation Inherent Resolve direct-use context: M4 carbines were fielded by Coalition Forces during range operations in northeast Syria. | Accessed: 2026-06-22Business Insider Ukrainian M4 transition reportPublisher: Business Insider | Note: 2014 Russia-Ukraine War direct-use context: Ukrainian special-operations personnel received U.S.-made M4A1 carbines after Russia's February 2022 full-scale invasion and later used M4-family rifles in combat missions. | Accessed: 2026-06-29Partnered marksmanship training in eastern AfghanistanPublisher: Defense Visual Information Distribution Service | Note: 2001 War in Afghanistan direct-use context: an M4 carbine was fired by a U.S. Army infantryman during partnered marksmanship training in eastern Afghanistan. | Accessed: 2026-06-22Iraq's Counter-Terrorism Service is Self-PerpetuatingPublisher: Defense Visual Information Distribution Service | Note: 2013 War in Iraq direct-use context: M4 rifles were used by Iraqi Counter-Terrorism Service soldiers during coalition-supported training near Baghdad. | Accessed: 2026-06-22PEO M4 Carbine RASPublisher: Wikimedia Commons | Note: Public-domain image provenance and licensing for the primary M4 carbine image. | Accessed: 2026-06-20M4A1 CarbinePublisher: Wikimedia Commons | Note: Public-domain image provenance and licensing for a close-up M4A1 carbine image. | Accessed: 2026-06-20PEO M4 Carbine RAS M68 CCOPublisher: Wikimedia Commons | Note: Public-domain image provenance and licensing for an M4 carbine configured with an optic. | Accessed: 2026-06-20