NAME (NATIVE) – Thompson Semi-Automatic Carbine Model of 1927
COUNTRY OF ORIGIN – USA
DATE OF MANUFACTURE – 1927
CALIBER – 11.43x23mm (.45 ACP)
OVERALL LENGTH WITHOUT STOCK – 54.1 cm (21.3 in)
OVERALL LENGTH WITH STOCK – 75.7 cm (29.8 in)
STOCK LENGTH – 33.1 cm (13.05 in)
BARREL LENGTH – 26.7 cm (10.5 in)
RIFLING (TYPE & TWIST) – 6 Groove, Right hand twist, one turn in 41 cm (16 in)
BULLET DIAMETER – 11.46 mm (0.451 in)
BULLET WEIGHT – 15 g (230 grains)
MUZZLE VELOCITY – 290 m/s (950 fps)
MUZZLE ENERGY – 625 j (451 ft/lbs)
WEIGHT (EMPTY) WITHOUT STOCK – 3.59 kg (8 lb 2.9 oz) with Vertical foregrip
WEIGHT (EMPTY) WITH STOCK – 4.39 kg (9 lb 11 oz) with Vertical foregrip
WEIGHT (LOADED) WITHOUT STOCK – 5.94 kg (13 lb 1.5 oz) loaded with 20-rd Type XX Magazine
WEIGHT (LOADED) WITH STOCK – 6.73 kg (14 lb 13.4 oz) loaded with 20-rd Type XX Magazine
STOCK WEIGHT – 0.80 kg (1 lb 12.2 oz)
SIGHTS – Front sight – Blade, Rear sight – Folding ladder peep sight, Graduated to 548.6 m (600 yds) in 23 m (25 yd) increments, Battle sight square notch, set to – 46 m (50 yds)
EFFECTIVE RANGE – 182.9 m (200 yds)
OPERATION – Delayed blowback with Blish principle
TYPE OF FIRE – Semiautomatic only
RATE OF FIRE – 50 rpm
FEED DEVICE – Type XX 20-round removable box magazine, double-column, double feed, Type L 50-round and Type C 100-round drum magazines
FEED DEVICE WEIGHT (EMPTY) – Type XX 20-rd 0.17 kg (6 oz), Type L 50-rd 1.18 kg (2 lb 9.6 oz), Type C 100-rd 1.64 kg (3 lb 9.9 oz)
FEED DEVICE WEIGHT (LOADED) – Type XX 20-rd 0.60 kg (1lb 5.2 oz), Type L 50-rd 2.26 kg (4 lb 15.7 oz), type C 100-rd 3.79 kg (8 lb 5.7 oz)
BASIC LOAD – One Type XX 20-rd mag
LOAD WT 0.60 kg (1 lb 5.2 oz)
MANUFACTURER – Auto-Ordnance, Cleveland Ohio, Colt Patent Fire Arms Manufacturing Company Hartford, Connecticut.
STATUS – Obsolete
SERVICE – Limited commercial sales.
This was a semiautomatic version of the M1921 Thompson. Some of the internal parts of the lower receiver were changed to keep the weapon from being able to fire on full automatic. It was not a commercial success and it is estimated that less than 200 were ever made. The semiautomatic carbine has been back into production (1967-Present) with changes that prevent it from being able to be converted to full automatic fire. The new weapon has a 16-inch barrel to meet with Federal firearms regulations for easier sales.
