CODE 03-132-966
NAME – XM177E1
COUNTRY OF ORIGIN – USA
DATE OF MANUFACTURE – 1966
CALIBER – 5.56x45mm (.223)
OVERALL LENGTH – 68 cm (26.77 in) Stock collapsed, 76.2 cm (30 in) stock extended
BARREL LENGTH – 25.4 cm (10 in) without flash suppressor, 38.1 cm (15 in) with noise/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 – 5.70 mm (0.224 in)
BULLET WEIGHT – 3.56 g (55 grains)
MUZZLE VELOCITY – 838 m/s (2750 fps)
MUZZLE ENERGY – 1252 j (924 ft/lb)
WEIGHT (EMPTY) – 2.47 kg (5 lb 7 oz)
WEIGHT (LOADED) – 2.79 kg (6 lb 2 oz) loaded with 20 rounds M193 Ball
SIGHTS – Open, iron, adjustable, Front sight – Round post, adjustable for zero range, Rear sight – Leaf-type with apertures for 0-300 m (0-328 yards) and 300-500 m (328 to 547 yards)
EFFECTIVE RANGE – 400 m (437 yards)
OPERATION – Gas impingement
TYPE OF FIRE – Selective, Semi and Full automatic
RATE OF FIRE – 45-65 rpm Semi, 150-200 rpm Full automatic, 12-15 rpm sustained rpm
CYCLIC ROF – 700-800 rpm
FEED DEVICE – 20 or 30 round aluminum magazine, double column, double feed
FEED DEVICE WEIGHT (EMPTY) – 20 rd – 0.080 kg (2.83 oz), 30-rd – 0.10 kg (3.5 oz)
FEED DEVICE WEIGHT (LOADED) – 20 rd – 0.32 kg (11 oz) loaded with 20 rds M193 Ball, 30-rd – 0.45 kg (1 lb) loaded with 30 rds M193 Ball
BASIC AMMUNITION LOAD – Six 20-round magazines (120 rounds)
LOAD WEIGHT – 1.92 kg (4 lb 4 oz)
MANUFACTURER – Colt Patent Fire Arms, Hartford, Connecticut
STATUS – Out of production
SERVICE – Limited use by Special Operations forces, evaluation
