CODE 03-041-976
NAME – HK91A3
COUNTRY OF ORIGIN – Germany
DATE OF MANUFACTURE – 1976
CALIBER – 7.62x51mm
OVERALL LENGTH – 84.1 cm (33.10 in) Stock collapsed, 102.6 cm (40.38 in) stock extended
BARREL LENGTH – 45 cm (17.72 in)
RIFLING (TYPE & TWIST) – 4 grooves, Right-hand twist, 1 turn in 30.5 cm (12 in)
LOAD – M80 Spitzer-pointed full jacketed ball
BULLET DIAMETER – 7.82 mm (0.308 in)
BULLET WEIGHT – 9.66 g (149 grains)
MUZZLE VELOCITY – 799 m/s (2620 fps)
MUZZLE ENERGY – 3,080 j (2,271 ft/lb)
WEIGHT (EMPTY) – 4.90 kg (10 lb 8 oz)
WEIGHT (LOADED) – 5.67 kg (12 lb 8 oz) with 20 rounds M80 ball in steel magazine
WEIGHT (LOADED) – 5.25 kg (11 lb 9 oz) with 20 rounds M80 ball in aluminum magazine
WEIGHT (MOUNTED) – 6.27 kg (13 lb 13 oz) with bipod and 20 rounds M80 ball in steel magazine
WEIGHT (MOUNTED) – 5.85 kg (12 lb 14 oz) with bipod and 20 rounds M80 ball in aluminum magazine
TYPE OF MOUNT – Folding removable bipod
WEIGHT OF MOUNT – 0.6 kg (1 lb 5 oz)
SIGHTS – Open, iron, adjustable, Front sight – Post in hooded sight ring, Rear sight – Rotary vertical drum with diopter and V-notch sights, V-notch and #2 peep are set for 200 meters (219 yards), #3 Peep is for 300 meters (328 yards) and #4 peep is for 400 meters (438 yards). Rear sight is screw adjustable for windage and elevation for zero.
EFFECTIVE RANGE – 400 m (437 yards)
OPERATION – Blowback, Delayed roller locked bolt system
TYPE OF FIRE – Semiautomatic
RATE OF FIRE – 40 rpm
FEED DEVICE – 20-round removable steel or aluminum box magazine, double column, double feed
FEED DEVICE WEIGHT (EMPTY) – 0.26 kg (9 oz) (Steel), 0.14 kg (5 oz) (Aluminum)
FEED DEVICE WEIGHT (LOADED) – 0.77 kg (1 lb 11 oz) (Steel) loaded with 20 rounds M80 Ball
FEED DEVICE WEIGHT (LOADED) – 0.65 kg (1 lb 7 oz) (Aluminum) loaded with 20 rounds M80 Ball
BASIC AMMUNITION LOAD – Two – 20 round magazines (40 rounds)
LOAD WEIGHT – 1.54 kg (3 lb 6 oz) (Steel magazines)
LOAD WEIGHT – 1.3 kg (2 lb 14 oz) (Aluminum magazines)
MANUFACTURER – Heckler & Koch GmbH, Oberndorf/Neckar, Germany
STATUS – Production completed
SERVICE – Commercial sales
