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XM312

The XM312 is a heavy machine gun derived from the XM307 25 mm autocannon and chambered for the .50 BMG cartridge. It was designed in response to a request by the U.S. military for a replacement for the aging M2 Browning heavy machine gun, and as a complement to the heavier XM307 Advanced Crew Served Weapon grenade launcher.

XM312
TypeHeavy machine gun
Place of originUnited States
Production history
DesignerGeneral Dynamics/Joint Services Small Arms Program
Designed1990
ManufacturerGeneral Dynamics
Produced2004
VariantsXM307
Specifications
Mass52 lb (19 kg)
Length61.42 in (1,560 mm)
Barrel length36 in (914 mm)
Width9.84 in (250 mm)
Height7 in (180 mm), 18 in (460 mm) adjustable tripod
Crew2

Cartridge.50 BMG
Caliber0.50 in (12.7 mm)
Action"Recoil-reducing action" (modified rotating bolt)
Rate of fire260 rpm
Maximum firing rangelethal and suppressive to 2,000 meters
Feed systemBelt-fed
SightsOpen, optics may be mounted.

It is capable of being converted quickly into an XM307 with a small number of parts and a few minutes of work at the unit level (and vice versa from the XM307).[1]

The Fiscal Year 2008 Appropriations bill awarded $10 million to General Dynamics for the XM307 and XM312.[2]

In May 2008 the U.S. Army had awarded General Dynamics Armament and Technical Products (GDATP) a $9 million contract to develop a lightweight .50-caliber machine gun called the XM806 to supplement the Browning M2.[3] The XM806 was canceled in 2012.[4] The Army at present will continue buying new M2s and Mk 19s to replenish the current guns that are wearing out.[5]

Specifications edit

 
A XM312 with its ground mount system
  • Weight:
    • Weight: 35 lb (16 kg) (weapon only).[6]
    • Weight: 53 lb (24 kg) (ground mount system). [6]
    • Weight: 88 lb (40 kg) (whole system).
  • Dimensions: 9.9W × 7.2H × 61.5L max. inches (251 mm × 183 mm × 1562 mm) (52.5L, 1334 mm) charged).
  • Portability: Man portable or vehicle mountable.
  • Stability: Up to 18 inch (460 mm) tripod height.
  • Operation: Currently a hybrid gas & recoil operating group. Gas powers the bolt mechanism while recoil drives the barrel/barrel extension and the feed system. Design changes are underway to totally eliminate the gas system to provide increased reliability and reduced complexity.
  • Environmental: Operationally insensitive to conditions.
  • Reliability: 6,000 MRBF (threshold) / 10,000 MRBF (objective).
  • Rate of fire:
    • 260 rounds per minute (4.3 Hz)(cyclic).[7]
    • 40 rounds per minute (0.7 Hz) (sustained, without barrel change). In burst of five to seven rounds, the same as the M2HB.
  • Dispersion: Less than 1.1 milliradian, one sigma radius.
  • Range: Lethal and suppressive out to 2,000 meters.
  • Ammunition: .50 BMG M33 ball, M8, M20 & Mk211 API, M903 SLAP.
  • Recoil: 300 foot-pounds (407 J)
  • Feed system: Weapon-mountable ammunition can or feed from any can using bellmouth attachment. M9 rear stripping link—common with current M2 ammunition. Left hand feed, right hand eject of cases and links.

Program status edit

  • September 2005: The XM312 is test fired by troops from the 1st Infantry Division at the Grafenwöhr Training Area in Germany.[8]

References edit

  1. ^ . Archived from the original on February 13, 2010. Retrieved November 9, 2007.
  2. ^ . Bangor Daily News. 10 November 2007. Archived from the original on 20 November 2018. Retrieved 13 May 2017.
  3. ^ "US Army contracts GDATP to develop new machine gun" - Jane's International Defence Review, May 20th 2008 July 24, 2008, at the Wayback Machine
  4. ^ Army Cuts XM806 - The Firearm Blog, 24 July 2012
  5. ^ "Weapons: Irreplaceable".
  6. ^ a b (PDF). Archived from the original (PDF) on June 6, 2011.
  7. ^ . Archived from the original on September 27, 2007.
  8. ^ Soldiers test new weapons at Grafenwöhr - EUCOM October 10, 2006, at the Wayback Machine

External links edit

  • General Dynamics 12.7mm / .50 XM312 Machinegun (USA) - Modern Firearms
  • XM312 - Deagel

xm312, heavy, machine, derived, from, xm307, autocannon, chambered, cartridge, designed, response, request, military, replacement, aging, browning, heavy, machine, complement, heavier, xm307, advanced, crew, served, weapon, grenade, launcher, typeheavy, machin. The XM312 is a heavy machine gun derived from the XM307 25 mm autocannon and chambered for the 50 BMG cartridge It was designed in response to a request by the U S military for a replacement for the aging M2 Browning heavy machine gun and as a complement to the heavier XM307 Advanced Crew Served Weapon grenade launcher XM312TypeHeavy machine gunPlace of originUnited StatesProduction historyDesignerGeneral Dynamics Joint Services Small Arms ProgramDesigned1990ManufacturerGeneral DynamicsProduced2004VariantsXM307SpecificationsMass52 lb 19 kg Length61 42 in 1 560 mm Barrel length36 in 914 mm Width9 84 in 250 mm Height7 in 180 mm 18 in 460 mm adjustable tripodCrew2Cartridge 50 BMGCaliber0 50 in 12 7 mm Action Recoil reducing action modified rotating bolt Rate of fire260 rpmMaximum firing rangelethal and suppressive to 2 000 metersFeed systemBelt fedSightsOpen optics may be mounted It is capable of being converted quickly into an XM307 with a small number of parts and a few minutes of work at the unit level and vice versa from the XM307 1 The Fiscal Year 2008 Appropriations bill awarded 10 million to General Dynamics for the XM307 and XM312 2 In May 2008 the U S Army had awarded General Dynamics Armament and Technical Products GDATP a 9 million contract to develop a lightweight 50 caliber machine gun called the XM806 to supplement the Browning M2 3 The XM806 was canceled in 2012 4 The Army at present will continue buying new M2s and Mk 19s to replenish the current guns that are wearing out 5 Contents 1 Specifications 2 Program status 3 References 4 External linksSpecifications edit nbsp A XM312 with its ground mount systemWeight Weight 35 lb 16 kg weapon only 6 Weight 53 lb 24 kg ground mount system 6 Weight 88 lb 40 kg whole system Dimensions 9 9W 7 2H 61 5L max inches 251 mm 183 mm 1562 mm 52 5L 1334 mm charged Portability Man portable or vehicle mountable Stability Up to 18 inch 460 mm tripod height Operation Currently a hybrid gas amp recoil operating group Gas powers the bolt mechanism while recoil drives the barrel barrel extension and the feed system Design changes are underway to totally eliminate the gas system to provide increased reliability and reduced complexity Environmental Operationally insensitive to conditions Reliability 6 000 MRBF threshold 10 000 MRBF objective Rate of fire 260 rounds per minute 4 3 Hz cyclic 7 40 rounds per minute 0 7 Hz sustained without barrel change In burst of five to seven rounds the same as the M2HB Dispersion Less than 1 1 milliradian one sigma radius Range Lethal and suppressive out to 2 000 meters Ammunition 50 BMG M33 ball M8 M20 amp Mk211 API M903 SLAP Recoil 300 foot pounds 407 J Feed system Weapon mountable ammunition can or feed from any can using bellmouth attachment M9 rear stripping link common with current M2 ammunition Left hand feed right hand eject of cases and links Program status editSeptember 2005 The XM312 is test fired by troops from the 1st Infantry Division at the Grafenwohr Training Area in Germany 8 References edit Xm307 Xm312 Archived from the original on February 13 2010 Retrieved November 9 2007 UM gets 18M in appropriations bill Bangor Daily News 10 November 2007 Archived from the original on 20 November 2018 Retrieved 13 May 2017 US Army contracts GDATP to develop new machine gun Jane s International Defence Review May 20th 2008 Archived July 24 2008 at the Wayback Machine Army Cuts XM806 The Firearm Blog 24 July 2012 Weapons Irreplaceable a b XM312 50 caliber 12 7mm machine gun GDATP Fact Sheet PDF Archived from the original PDF on June 6 2011 XM312 50 Caliber 12 7mm Machine Gun GDATP Archived from the original on September 27 2007 Soldiers test new weapons at Grafenwohr EUCOM Archived October 10 2006 at the Wayback MachineExternal links edit nbsp Wikimedia Commons has media related to XM312 General Dynamics 12 7mm 50 XM312 Machinegun USA Modern Firearms XM312 Deagel Retrieved from https en wikipedia org w index php title XM312 amp oldid 1204890073, wikipedia, wiki, book, books, library,

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