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Thompson Submachine Gun

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Thompson Submachine Gun
Quick Overview
Overview

The Thompson submachine gun, often called the "Tommy Gun," is a blow‑back, selective‑fire SMG designed in the early 1920s to provide a high‑rate, close‑quarters firepower platform for law‑enforcement, military, and civilian markets. Its hallmark is the exceptionally fast cyclic rate of 600–1,250 rpm, achieved through a heavy bolt and a simple open‑bolt blow‑back system. The weapon’s distinctive vertical‑handguard, cut‑away rear sight drum, and iconic wooden stock set it apart visually. Originally chambered for .45 ACP, the Thompson was praised for its stopping power and reliability, gaining a reputation as both a feared gangster weapon and a beloved "trench broom" in World War II. Unique features include a two‑stage trigger for semi‑automatic fire, a built‑in compensator on the barrel, and interchangeable 20‑, 30‑, and 50‑round drum magazines, making it versatile for both rapid suppressive fire and controlled single shots.

Dimensions
Overall Length
762 mm (30.0 in) with stock extended; 660 mm (26.0 in) with stock folded (M1A1)
Barrel Length
254 mm (10.0 in) standard; 305 mm (12.0 in) for some export models
Weight
4.4 kg (9.7 lb) empty (M1); 3.9 kg (8.6 lb) empty (M1A1)
Mechanical
Action Type
Simple blow‑back, open‑bolt, selective‑fire; rate of fire 600–1,250 rpm depending on model
Trigger Type
Two‑stage trigger: semi‑automatic (first pull) and fully‑automatic (second pull) on early models; later models use a single‑stage full‑auto trigger with a selector switch
Sights Type
Rotary drum rear sight with 50, 100, 200, 300 yard settings; hooded front post; optional adjustable rear sight on later police variants
Magazine Capacity
20‑round box, 30‑round box, 50‑round drum, 100‑round drum (rare)
Additional Information

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