CODE – 02-132-970
NAME – Colt Lightweight Rifle/Submachine Gun
NAME (NATIVE) – Colt IMP 221 [Individual Multi-Purpose Weapon]
COMMON NAMES –– GUU-4/P- Gun, Unit, Miscellaneous
COUNTRY OF ORIGIN – USA
DATE OF MANUFACTURE – 1970
CALIBER – 5.7x36mm (.221 Fireball)
OVERALL LENGTH – 43.2 cm (17 in) with flash suppressor
BARREL LENGTH – 25.4 cm (10 in)
RIFLING (TYPE & TWIST) – 1 turn in 30.5 cm (12 in)
BULLET DIAMETER – 5.7 mm (0.224 in)
BULLET WEIGHT – 3.24 g (50 grains)
MUZZLE VELOCITY – 732 m/s (2400 fps)
MUZZLE ENERGY – 867 j (640 ft/lb)
WEIGHT (EMPTY) – 1.66 kg (3 lb 10.6 oz)
WEIGHT (LOADED) – 2.11 kg (4 lb 10.4 oz)
SIGHTS – Open, Iron, Adjustable (Triple set), Front sight – Post, adjustable vertically for elevation when zeroing, Rear sight – Aperture peep, adjustable for windage when zeroing
EFFECTIVE RANGE – 100 meters (109 yards)
OPERATION – Gas operated, fires from closed bolt
TYPE OF FIRE – Selective, Semi and Full automatic
RATE OF FIRE – 40 rpm Semi, 90 rpm Full automatic
CYCLIC ROF – 500 rpm
FEED DEVICE – 10 or 30 round box magazine, double column, double feed
FEED DEVICE WEIGHT (EMPTY) – 0.15 kg (5.3 oz)
FEED DEVICE WEIGHT (LOADED) – 0.45 kg (1 lb)
BASIC AMMUNITION LOAD – Three 30-round magazines (90 rounds)
LOAD WEIGHT – 1.35 kg (3 lb)
MANUFACTURER – Colt Industries Military Arms Division,
STATUS – Technology Demonstrators only
SERVICE – None
