CODE 04-041-971

NAME – HK 23

COUNTRY OF ORIGIN – Germany

DATE OF MANUFACTURE – 1971

CALIBER – 5.56x45mm NATO

OVERALL LENGTH – 101.6 cm (40 in)

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

RIFLING (TYPE & TWIST) – 6 Groove, Right-hand twist, 1 turn in 30.5 cm (12 in)

LOAD – M193 Ball Spitzer-pointed full metal jacket

BULLET DIAMETER – 5.69 mm (0.224 in)

BULLET WEIGHT – 3.56 g (55 grains)

MUZZLE VELOCITY – 970 m/s (3,181 fps)

MUZZLE ENERGY – 1,676 j (1,236 ft/lb)

WEIGHT (EMPTY) – 7.95 kg (17 lb 8 oz)

WEIGHT (LOADED) – 11.01 kg (24 lb 4 oz) loaded with belt box holding 200-round belt M193 ball

WEIGHT (MOUNTED) – 11.83 kg (26 lb 1 oz) with bipod, sling, support grip, loaded with belt box holding 200-round belt M193 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 1000 meters (109 to 1,094 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 – 1,000 m (1094 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 120 rpm full automatic

CYCLIC ROF – 800 rpm

FEED DEVICE – M27 disintegrating metallic link belt

FEED DEVICE WEIGHT (EMPTY) – 200 M27 links – 0.414 kg (14.6 oz)

200-round belt box (Empty) – 0.70 kg (1 lb 9 oz)

FEED DEVICE WEIGHT (LOADED) – 2.36 kg (5 lb 3 oz) 200 rounds M193 ball in M27 links

200-round belt box (LOADED) – 3.06 kg (6 lb 12 oz) loaded with 200 rounds M Ball in M27 link belt

BASIC AMMUNITION LOAD – Five 200-round belts (1,000 rounds)

LOAD WEIGHT – 11.8 kg (26 lb)

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

STATUS – Production completed

SERVICE – International sales