CODE 04-041-979

NAME – HK 21A1 – 7.62x51mm

COUNTRY OF ORIGIN – Germany

DATE OF MANUFACTURE – 1979

CALIBER – 7.62x51mm

OVERALL LENGTH – 82 cm (32.28 in) without buttstock, 103 cm (45.98 in) with buttstock

BARREL LENGTH – 45 cm (17.72 in) without flash hider

RIFLING (TYPE & TWIST) – 4 Grooves, Right-hand twist, 1 turn in 30.5 cm (12 in)

LOAD – M80 Ball Spitzer-pointed full jacketed

BULLET DIAMETER – 7.82 mm (0.308 in)

BULLET WEIGHT – 9.66 g (149 grains)

MUZZLE VELOCITY – 839 m/s (2751 fps)

MUZZLE ENERGY – 3395 j (2504 ft/lb)

WEIGHT (EMPTY) – 7.70 kg (17 lb)

WEIGHT (LOADED) – 11.75 kg (25 lb 15 oz) loaded with belt box holding 100-round belt M80 ball

WEIGHT (MOUNTED) – 12.62 kg (27 lb 13 oz) with bipod, sling, support grip, loaded with belt box holding 100-round belt M80 ball

WEIGHT (MOUNTED) – 22.82 kg (50 lb 5 oz) with bipod, sling, support grip, on tripod mount, loaded with belt box holding 100-round belt M80 ball

TYPE OF MOUNT – Removable folding bipod

WEIGHT OF MOUNT – 0.60 kg (1 lb 5 oz)

TYPE OF MOUNT – 1102 Tripod Mount

WEIGHT OF MOUNT – 10.2 kg (22 lb 8 oz)

WEIGHT OF SPARE BARREL – 1.7 kg (3 lb 12 oz)

WEIGHT OF BUTTSTOCK – 0.21 kg (7 oz) w/o cap or spring

WEIGHT OF SLING – 0.17 kg (6 oz)

WEIGHT OF SUPPORT GRIP – 0.10 kg (3.5 oz)

SIGHTS – Open, iron, adjustable, Front sight – Hooded post, Rear sight, aperture with rotating elevation drum, 100 meters click stops (109 yard) graduated 100 to 1100 meters (109 to 1,203 yards)

OPTICAL SIGHT – ZF 4×24

OPTICAL SIGHT WEIGHT – 0.65 kg (1 lb 7 oz) with mount

OPTICAL SIGHT MAGNIFICATION – 4 Power

OPTICAL SIGHT FIELD OF VIEW – 5 degrees 40 minutes – 10 m @ 100 m (30 ft @100 yds)

OPTICAL SIGHT ADJUSTMENTS – Adjustable for windage and elevation, 6 adjustments from 100 to 600 m (109 to 656 yards)

EFFECTIVE RANGE – 1,200 m (1312 yards)

OPERATION – Blowback, Delayed roller locked bolt system, fires from closed bolt

TYPE OF FIRE – Selective, semi and full automatic

RATE OF FIRE – 50 rpm semi, up to 200 rpm full automatic with barrel change

CYCLIC ROF – 900 rpm

FEED DEVICE – DM 60/M13 disintegrating link belt

FEED DEVICE WEIGHT (EMPTY) – 100 M13 links – 0.428 kg (15 oz)

100-round belt box (Empty) – 1.08 kg (2 lb 6 oz)

FEED DEVICE WEIGHT (LOADED) – 100-rd M13 link belt – 2.97 kg (6 lb 9 oz) loaded with 100 rounds M80 Ball

100-round belt box (LOADED) – 4.05 kg (8 lb 15 oz) loaded with 100 rounds M80 Ball in M13 link belt

BASIC AMMUNITION LOAD – Ten 100-rd belts (1,000 rounds)

LOAD WEIGHT – 29.7 kg (65 lb 8 oz)

MANUFACTURER – Heckler & Koch GmbH, Oberndorf/Neckar, Germany

STATUS – Production completed, licensed production in other countries

SERVICE – German military, extensive sales international militaries