CODE 04-041-984

NAME – HK 73

COUNTRY OF ORIGIN – Germany

DATE OF MANUFACTURE – 1984

CALIBER – 5.56x45mm NATO

OVERALL LENGTH – 103 cm (40.55 in)

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

RIFLING (TYPE & TWIST) – 6 Groove, Right-hand twist, 1 turn in 17.8 cm (7 in)

LOAD – SS109/M855 Full metal jacket with steel core penetrator

BULLET DIAMETER – 5.69 mm (0.224 in)

BULLET WEIGHT – 4.02 g (62 grains)

MUZZLE VELOCITY – 939 m/s (3082 fps)

MUZZLE ENERGY – 1773 j (1308 ft/lb)

WEIGHT (EMPTY) – 8.15 kg (18 lb)

WEIGHT (LOADED) – 10.74 kg (23 lb 11 oz) loaded with ammunition box holding 150 rounds M855 ball

WEIGHT (MOUNTED) – 11.56 kg (25 lb 8 oz) with bipod, sling, support grip, loaded with ammunition box holding 150 rounds M855 ball

TYPE OF MOUNT – Folding removable bipod

WEIGHT OF MOUNT – 0.55 kg (1 lb 3 oz)

WEIGHT OF SPARE BARREL – 1.6 kg (3 lb 8 oz) with flash suppressor

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 – 150 round spring-loaded ammunition container

FEED DEVICE WEIGHT (EMPTY) – 0.74 kg (1 lb 10 oz)

FEED DEVICE WEIGHT (LOADED) – 2.59 kg (5 lb 11 oz) loaded with 150 rounds M855 ball

One 10-round stripper clip (loaded) – 0.133 kg (4.7 oz)

4-pocket bandoleer with twelve 10-round stripper clips (loaded) – 1.78 kg (3 lb 15 oz) (120 rounds)

BASIC AMMUNITION LOAD – Two 150 round ammunition boxes, Four-4 pocket bandoleers (780 rounds)

LOAD WEIGHT – 12.30 kg (27 lb 2 oz)

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

STATUS – Out of production

SERVICE – Evaluation