CODE – 02-041-982
NAME – HK 54A1
COUNTRY OF ORIGIN – Germany
DATE OF MANUFACTURE – 1982
CALIBER – 9x19mm
OVERALL LENGTH – 41.1 cm (16.19 in) Stock collapsed, 61.6 cm (24.25 in) Stock extended
OVERALL LENGTH WITH SUPPRESSOR MOUNTED – 59.7 cm (23.5 in) Stock collapsed, suppressor mounted, 80 cm (31.5 in) with stock extended, suppressor mounted
BARREL LENGTH – 17.9 cm (7.06 in)
SUPPRESSOR LENGTH – 33.4 cm (13.13 in)
SUPPRESSOR DIAMETER – 4.7 cm (1.85 in)
RIFLING (TYPE & TWIST) – 6-Groove, Right-hand twist, 1 turn in 25 cm (9.84 in)
BULLET DIAMETER – 9.02 mm (0.355 in)
BULLET WEIGHT – 8.04 g (124 grains)
MUZZLE VELOCITY – 396 m/s (1300 fps) Vent ports closed for maximum velocity
MUZZLE VELOCITY – 287 m/s (940 fps) Vent ports open for subsonic velocity
MUZZLE ENERGY – 631 j (465 ft/lb) Vent ports closed for maximum velocity
MUZZLE ENERGY – 330 j (243 ft/lb) Vent ports open for subsonic velocity
WEIGHT (EMPTY) – 2.98 kg (6 lb 9.1 oz)
WEIGHT (LOADED) – 4.28 kg (9 lb 7 oz) loaded with 50 rd drum with M882 Ball
WEIGHT (LOADED) WITH SUPPRESSOR – 4.7 kg (10 lb 5.8 oz) Loaded with 50 rounds M882 Ball, suppressor mounted
SUPPRESSOR WEIGHT – 0.42 kg (14.8 oz)
SUPPRESSOR MOUNTING – Integral with barrel/receiver
SUPPRESSOR OPERATION – Three-stage, expansion chamber, angular baffle stack diffuser, muzzle expansion chamber
SIGHTS – Open iron, adjustable, Front – Ring-protected fixed blade, Rear – Rotating vertical drum with 4 peep apertures of varying size, Adjustable for windage and elevation
EFFECTIVE RANGE – 135 m (150 yards)
OPERATION – Roller-delayed blowback, fires from closed bolt, hammer fired
TYPE OF FIRE – Selective, Semiautomatic/Three-round controlled burst/Full automatic/Locked Breech, Single shot
RATE OF FIRE – 40 rpm Semi, 100 rpm Full
CYCLIC ROF – 800 rpm
FEED DEVICE – 50 round removable spring-loaded drum magazine
FEED DEVICE WEIGHT (EMPTY) – 0.68 kg (1 lb 8 oz)
FEED DEVICE WEIGHT (LOADED) – 1.30 kg (2 lb 13.9 oz) Loaded with 50 rounds M882 Ball
BASIC LOAD – Three 50-rd magazines (150 rounds)
LOAD WT – 3.9 kg (8 lb 9.6 oz)
MANUFACTURER – Heckler & Koch GmbH Oberndorf am Necker, Germany
STATUS – Developmental only
SERVICE – Evaluation, some limited combat evaluation
