Infantry Weapons

12.7 mm heavy machine gun

Also known as
  • M2 .50 caliber machine gun
  • Browning M2 machine gun
  • Ma Deuce
  • CANiK M2 QCB
  • CANiK M2HB QCB

The 12.7 mm heavy machine gun class covers the Browning M2 lineage and compatible .50-caliber variants such as the M2A1, M2HB-QCB, and CANiK M2 QCB. U.S. Army Reserve Cold Steel materials show the M2 trained on mounted military platforms including the HMMWV, while Army, Marine, and manufacturer sources place the family on tripods, vehicles, boats, aircraft, and remote weapon stations.

12.7 mm heavy machine gun, Belt-fed, crew-served heavy machine gun class, Infantry Weapons
Image source: PEO Browning M2 HB Machine Gun.jpg
Mounted Vehicle Use

Army Guide shows the class mounted on an Al-Shibl 2 example through a remote overhead weapon station, and the same vehicle family also uses manual ring mounts that can accept a 12.7 mm gun.

VehicleMounted roleEvidence
Al-Shibl 2 armored vehicle, 4x4 light armored personnel carrier, Armored VehiclesAl-Shibl 2 armored vehicleRemote or ring-mounted heavy machine gunArmy Guide explicitly names a remote overhead weapon station armed with a .50 (12.7 mm) machine gun.
Profile / Specs

Profile

Origin
United States / Turkey
Type
Belt-fed, crew-served heavy machine gun class
Service note
Interwar lineage with modern M2-family and compatible 12.7 mm weapons still in service
Designer
John M. Browning
Designed
Late World War I to 1923 fielding of the M1921
Unit cost
About US$15,500 each, implied by a reported US$3.1 million Brazil order for 200 units
Produced
1923 to present for the M2 family and modern derivatives
Number built
Produced in very large numbers across U.S. and licensed production lines; exact consolidated totals not publicly released

Specifications

Caliber
12.7x99 mm NATO / .50 BMG class
Operation
Belt-fed, recoil-operated, air-cooled, crew-served
Feed
Right- or left-side linked-belt feed
Mounting
Ground tripod, vehicle mount, naval craft mount, aircraft installation, or remote weapon station
Weight
38 kg for Canadian Army M2HB-QCB data; 84 lb for FN M2HB-QCB data
Rate of fire
40 rpm sustained and 635 rpm maximum in Canadian Army M2HB-QCB data
Range
600 m effective against armor and 1,850 m maximum range in Canadian Army M2HB-QCB data
Barrel life
Over 25,000 rounds in CANiK product literature
Dispersion
Less than 6 MOA in CANiK product literature
Corrosion protection
Marine-grade anti-corrosion coating on the CANiK QCB barrel system
Variants
  • M1921
  • M2
  • M2HB
  • M2A1
  • M2HB-QCB
Compatible Patrol Boats

The Cutlass class was announced as fitted for .50-caliber heavy machine guns.

Compatible itemItem typeCompatibility evidence
Cutlass Class, Force protection patrol boat, Naval SystemsCutlass ClassFast patrol boat

GOV.UK says HMS Cutlass will be fitted for, but not with, 0.50-cal heavy machine guns.

Sources: GOV.UK: Royal Navy confirms two new fast patrol boats

Carrier Vehicles

The Cougar MRAP can be fitted with a roof-mounted 12.7 mm heavy machine gun.

CarrierCarrier typeCarriage evidence
Cougar 4x4 MRAP, 4x4 mine-resistant ambush-protected vehicle, Armored VehiclesCougar 4x4 MRAPMine-resistant ambush-protected vehicle

Army Recognition says the Cougar MRAP roof can be fitted with an open-top weapon station or a remotely controlled weapon station armed with a 12.7 mm heavy machine gun.

Sources: Poland signs contract to purchase 300 second-hand Cougar MRAP vehicles from US

Timeline

12.7 mm heavy machine gun Key Events

  1. Browning Heavy Machine Gun Work Begins

    Marine training material traces the M2 lineage to John M. Browning's late-World War I heavy machine-gun development work.

    Sources: U.S. Marine Corps Heavy Machineguns student handout

  2. M2 Enters Service As The M1921

    U.S. Army history says the gun first entered service in 1923 as the M1921.

    Sources: U.S. Army M2 history

  3. M2A1 Fielding Begins

    Marine training material says the M2A1 was fielded beginning in 2011 and added fixed headspace and timing with a quick-change barrel.

    Sources: U.S. Marine Corps Heavy Machineguns student handout

  4. Army Reserve Continues M2A1 Qualification

    The Army Reserve reported transportation soldiers qualifying with Browning M2A1 machine guns at Fort McCoy.

    Sources: Army Reserve Browning M2A1 qualification

Media

12.7 mm heavy machine gun Images

12.7 mm heavy machine gun, Belt-fed, crew-served heavy machine gun class, Infantry Weapons - view 1
Source: Machine gun M2 1.jpg
12.7 mm heavy machine gun, Belt-fed, crew-served heavy machine gun class, Infantry Weapons - view 2
Source: M2 machine gun.jpg
Related Weapon Systems
Electric trigger DD-M2-S1 for 12.7 mm Browning M2 machine gun, Electric trigger / solenoid, Support EquipmentSupport EquipmentElectric trigger DD-M2-S1 for 12.7 mm Browning M2 machine gunElectric trigger / solenoidThe DD-M2-S1 is a Ukrainian electric trigger and solenoid for the 12.7 mm Browning M2 machine gun, designed to turn crew-served M2-family weapons into remotely fired payloads for combat modules, turrets, armored vehicles, and ground robots. DevDroid presents it as a domestic remote-fire component for safer operation without direct exposure at the weapon position, while Brave Inventors lists the unit at 1.6 kg with 24-28 V operating power and IP-54 protection.
FN MAG general-purpose machine gun, 7.62x51mm NATO general-purpose machine gun, Infantry WeaponsInfantry WeaponsFN MAG general-purpose machine gun7.62x51mm NATO general-purpose machine gunThe FN MAG is FN Herstal's Belgian 7.62x51mm NATO belt-fed general-purpose machine gun family, fielded from infantry bipods, tripods, vehicles, aircraft, ships, and boats. The catalog record connects the MAG and its M240/L7A2/MAG 58 designations to directly sourced conflict evidence: surrendered Boko Haram-held stocks in Nigeria, coalition base-defense training during Operation Inherent Resolve, and Afghan special-operations weapons training during the War in Afghanistan.

Sources

U.S. Army M2 historyPublisher: U.S. Army | Note: Supports M2 lineage background: the weapon entered service as the M1921 in 1923 and the Army history article places the gun on aircraft, ground vehicles, and warships. | Accessed: 2026-06-24Video: French Navy's New POM OPV for the Indo-Pacific | Naval NewsPublisher: Naval News | Note: Supports the Félix Éboué class armament fit including 12.7 mm machine guns on the POM class. | Accessed: 2026-06-28U.S. Marine Corps Heavy Machineguns student handoutPublisher: U.S. Marine Corps Training Command | Note: Supports M2A1 background and specs: the handout describes the gun as belt-fed, recoil-operated, air-cooled, crew-served, capable of single-shot and automatic fire, and fielded beginning in 2011. | Accessed: 2026-06-24Army Reserve Browning M2A1 qualificationPublisher: U.S. Army Reserve | Note: Supports continued U.S. Army Reserve training and qualification with the Browning M2A1 on 2022-04-09. | Accessed: 2026-06-24Cold Steel mounted weaponsPublisher: U.S. Army Reserve | Note: Supports M2 .50-caliber machine gun carriage on HMMWV and other mounted military platforms during Operation Cold Steel III training. | Accessed: 2026-06-27FN M2HB-QCBPublisher: FN America | Note: Supports representative M2HB-QCB manufacturer background, .50 caliber, weight, barrel length, effective range, feed system, and mounting context. | Accessed: 2026-06-21FN® M2HB QCB MK2Publisher: FN Herstal | Note: Supports the FN M2HB QCB MK2 relationship to the 12.7x99 mm NATO / .50 BMG cartridge family. | Accessed: 2026-06-28FN Herstal M2HB-QCB .50-Cal. Heavy Machine GunPublisher: Canadian Army | Note: Supports representative .50-caliber heavy machine gun specifications, ammunition types, vehicle/tripod mounting, and supporting-fire role. | Accessed: 2026-06-21GOV.UK: Royal Navy confirms two new fast patrol boatsPublisher: GOV.UK | Note: Supports the Cutlass-class fit-for context for .50-cal heavy machine guns. | Accessed: 2026-06-28Al Shibl 2Publisher: Army Guide | Note: Supports mounted relationship context for a .50 / 12.7 mm machine gun on the Al-Shibl 2 example and the vehicle's ring-mount compatibility. | Accessed: 2026-06-23Patrouilleurs Antilles Guyane - Ministère des ArméesPublisher: Ministère des Armées / Marine nationale | Note: Supports the Confiance-class armament list that includes two 12.7 mm machine guns. | Accessed: 2026-06-28CANiK M2 QCB product pagePublisher: CANiK | Note: Supports CANiK manufacturer background, the M2 QCB product identity, 12.7 mm caliber, mounting context, barrel life, dispersion, and corrosion-protection claims. | Accessed: 2026-06-27Brave Inventors compatibility listPublisher: Brave Inventors | Note: Supports DD-M2-S1 compatibility with Browning M2-family machine guns including Canik M2HB QCB. | Accessed: 2026-06-27CANiK M2 QCB service newsPublisher: CANiK News | Note: Supports Turkey-origin background, development history, Turkish service entry, and delivery context for the CANiK M2 QCB heavy machine gun. | Accessed: 2026-06-27Brave Inventors compatibility listPublisher: Brave Inventors | Note: Supports DD-M2-S1 compatibility with Canik M2HB QCB and other Browning M2 family variants. | Accessed: 2026-06-27TechBreak Brazil orderPublisher: TechBreak | Note: Supports the reported 200-unit, US$3.1 million Brazil order and the integration of CANiK M2 QCB guns into remotely and manually operated weapon stations. | Accessed: 2026-06-27Poland signs contract to purchase 300 second-hand Cougar MRAP vehicles from USPublisher: Army Recognition | Note: Supports Cougar MRAP carriage of a 12.7 mm heavy machine gun on the roof weapon station. | Accessed: 2026-06-28Peykaap ClassPublisher: GlobalSecurity.org | Note: Supports the Peykaap III/Zolfaghar small-boat weapons listing that includes a 12.7 mm/50 machine gun. | Accessed: 2026-06-24Bundeswehr: Fregatten der Baden-Wuerttemberg-KlassePublisher: Bundeswehr | Note: Supports the Baden-Württemberg-class frigates as carriers for five HITROLE N weapon stations with 12.7 mm machine guns. | Accessed: 2026-06-28Flamant class Offshore Patrol Vessel OPV French Navy MarinePublisher: seaforces.org | Note: Supports the Flamant class armament list that includes 2 x 12.7 mm machine guns. | Accessed: 2026-06-28The IRGC and the Persian Gulf RegionPublisher: Middle East Institute | Note: Supports lower-end Ashura boats armed with a 12.7 mm machine gun. | Accessed: 2026-06-24PEO Browning M2 HB Machine Gun.jpgPublisher: Wikimedia Commons | Note: Image provenance for the primary M2 heavy machine gun image; the file page identifies PEO Soldier/U.S. Army government-work public-domain status. | Accessed: 2026-06-21Machine gun M2 1.jpgPublisher: Wikimedia Commons | Note: Image provenance for an M2 heavy machine gun on an M3 mount; the file page lists U.S. Army public-domain status. | Accessed: 2026-06-21M2 machine gun.jpgPublisher: Wikimedia Commons | Note: Image provenance for an M2 machine gun image; the file page lists U.S. Navy public-domain status. | Accessed: 2026-06-21