CODE 04-041-981
NAME – HK 21 E – 7.62x51mm
COUNTRY OF ORIGIN – Germany
DATE OF MANUFACTURE – 1981
CALIBER – 7.62x51mm
OVERALL LENGTH – 82 cm (32.28 in) without buttstock, 103 cm (45.98 in) with buttstock
BARREL LENGTH – 56 cm (22.05 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 – 865 m/s (2837 fps)
MUZZLE ENERGY – 3611 j (2663 ft/lb)
WEIGHT (EMPTY) – 7.96 kg (17 lb 9 oz)
WEIGHT (LOADED) – 11.72 kg (25 lb 13 oz) loaded with belt box holding 100-round belt M80 ball
WEIGHT (MOUNTED) – 12.54 kg (27 lb 10 oz) with bipod, sling, support grip, loaded with belt box holding 100-round belt M80 ball
WEIGHT (MOUNTED) – 22.74 kg (50 lb 2 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 – 0.55 kg (1 lb 3 oz)
TYPE OF MOUNT – 1102 tripod mount
WEIGHT OF MOUNT – 10.2 kg (22 lb 8 oz)
WEIGHT OF SPARE BARREL – 2.20 kg (4 lb 14 oz)
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, three-round burst, and full automatic
RATE OF FIRE – 50 rpm semi, up to 200 rpm full automatic with barrel change
CYCLIC ROF – 800 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) – 0.79 kg (1 lb 12 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) – 3.76 kg (8 lb 5 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
As of 1995, the HK 21 E could no longer feed from the earlier DM-1 non-disintegrating link belt.
