CODE – 02-132-1942
NAME – Thompson M1928A1 with Straight Stock
COUNTRY OF ORIGIN – USA
DATE OF MANUFACTURE – 1942
CALIBER – 11.43x23mm (.45 ACP)
OVERALL LENGTH – 80.8 cm (31.8 in)
BARREL LENGTH – 26.7 cm (10.5 in) Not including sight base
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 grain)
MUZZLE VELOCITY – 290 m/s (950 fps)
MUZZLE ENERGY – 625 j (451 ft/lbs)
WEIGHT (EMPTY) – 4.90 kg (10 lbs 12.8 oz)
WEIGHT (LOADED) – 5.51 kg (12 lb 2.4 oz) with 20-rd Type XX magazine
SIGHTS – Open, Iron, Adjustable, Front sight elevated blade, Rear sight, folding peep sight, adjustable for elevation
EFFECTIVE RANGE – 182.9 m (200 yds)
OPERATION – Delayed blowback with Blish principle, fires from open bolt
TYPE OF FIRE – Selective, Semi and Full automatic
RATE OF FIRE – 50 rpm (Semi), 70 rpm (Full using 20 rd magazines), 100 rpm (Full using 50 rd drums)
CYCLIC ROF – 750 rpm
FEED DEVICE – 20 (Type XX) or 30 (Type XXX) round box magazine, Double column, double feed, 50 (Type C) round drum magazine
FEED DEVICE WEIGHT (EMPTY) – 20 rd 0.18 kg (6.4 oz), 30 rd 0.23 kg (8 oz), 50 rd drum 1.13 kg (2 lbs 7.8 oz)
FEED DEVICE WEIGHT (LOADED) – 20 rd 0.61 kg (1 lb 5.4 oz), 30 rd 0.86 kg (1 lb 14.3 oz), 50 rd drum 2.21 kg (4 lbs 14 oz)
BASIC LOAD – Five Type XX 20-rd magazines, 2 Type L 50-rd drums (200 rounds)
LOAD WT – 7.52 kg (16 lb 9.3 oz)
MANUFACTURER – US Military
STATUS – Obsolete
SERVICE – None, experimental only
