XM29 OICW

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XM29 OICW
XM29 – Later Vintage Mockup
Type	Assault rifle with bullpup grenade launcher module
Place of origin	United States Germany
Production history
Designer	Heckler & Koch, Alliant Techsystems
Manufacturer	Heckler & Koch, Alliant Techsystems
Produced	1996–2004 (prototypes only)
Variants	XM8 and XM25
Specifications
Mass	5.4 kg empty and 6.81 kg loaded (planned)[1] 6.8 kg unloaded[2] and 8.17 kg loaded (actual)[1]
Length	890 mm (35 in)[2]
Barrel length	KE Module: 250 mm (9.8 in)[3] HE Module: 460 mm (18 in) [3]
Cartridge	KE Module: 5.56×45mm NATO HE Module: 20×28mm grenade
Caliber	KE Module: 5.56 mm HE Module: 20 mm
Action	Gas-operated, rotating bolt
Rate of fire	800-850 rounds/min (KE Module) [2][1] 10 rounds/min (HE Module)[1]
Muzzle velocity	750 m/s (2,500 ft/s) (KE) 180 m/s (590 ft/s) (HE)
Effective firing range	~600-800m (Max ~3,000m) HE: 1,000m (Max: ~2,000m)
Feed system	KE Module: Various STANAG magazines HE Module: 5-round detachable box magazine
Sights	Integrated 6× thermal vision, night vision optics with computer-assisted sighting and laser rangefinder

The XM29 OICW (Objective Individual Combat Weapon) was a series of prototypes of a new type of assault rifle that fired 20 mm HE airbursting projectiles. The prototypes were developed as part of the Objective Individual Combat Weapon program in the 1990s. The term SABR (Selectable Assault Battle Rifle) was also used at certain points, but is less common.