HK 51

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HK 51
Type	assault carbine
Place of origin	Germany
Production history
Manufacturer	Heckler & Koch
Specifications
Weight	3.43 kg (7.54 lbs.) [HK-51A2] 3.11 kg (6.85 lbs.) [HK-51A3]
Length	787mm (30.98 inches) [HK-51A2] 589 mm (23.17 inches) stock retracted, 780 mm (30.72-inches) stock extended. [HK-51A3]
Barrel length	211 mm (8.31-inches)
Cartridge	7.62 × 51 mm NATO
Caliber	7.62 mm (.308 in)
Action	Roller-delayed blowback
Rate of fire	600 round/min
Muzzle velocity	790 m/s (2,600 ft/s)
Effective range	500 m (546 yd)
Feed system	20-round detachable box magazine
Sights	Rear: rotary diopter; front: hooded post

The HK 51, contrary to popular belief, is not made by H&K, being a creation of the American Class II manufacturing after-market.

The HK 51 has no real standards but is usually a cut down and modified HK G3 (or its semi-automatic clones the HK 41 and HK 91) and modified to take MP-5 furniture and accessories. It is usually fitted with a collapsable stock.

[edit] Variants

• HK-51A2*: This is an unofficial aftermarket term for a G3A2 (fixed-stock model) with an 211 mm (8.31-inch) barrel.
• HK-51A3*: This is an unofficial aftermarket term for a G3A3 (retractable stock model) with an 211 mm (8.31-inch) barrel.
• Fleming Arms HK-51S*: The HK-51S (Selbslade, or "self-loading") is an aftermarket semi-auto HK41 or HK91 with the 315mm (12.4-inch) barrel from the G3K carbine, a fixed stock, an MP-5 fat "tropical" forend, and a semi-auto trigger group. It looks like an HK 94 pistol carbine on steroids. Civilian models had a 412 mm (16.2-inch) barrel.
• HK-51K*: The HK-51K (Kurtz, or "short") is a full auto G3 or G3K with a 127 mm (5-inch) barrel, a butt cap, and a MP-5K foregrip. It is suggested that the operator use earplugs, tinted eye-protectors and light gloves when firing this weapon due to the report, muzzle flash, and cinders of semi-burnt propellant created by this monster.