The Thompson M1 Lightweight is a semi-automatic rifle chambered in .45 ACP, built as a lightweight take on the classic Tommy Gun profile. It has a 16.5-inch barrel with a blued aluminum alloy receiver and barrel, paired with a walnut-grain polymer fixed stock and grip. The rifle feeds from a 10-round stick magazine, and drum magazines are not compatible with this model. 
 

Key Specifications 

• Brand: Thompson 
• Model: M1 Lightweight (TM1CP10S) 
• Caliber: .45 ACP 
• Action: Semi Auto 
• Capacity: 10+1 
• Barrel Length: 16.5" 
• Finish: Blued 
• Stock Material: Walnut-grain polymer 
   

Detailed Features 

• Aluminum alloy barrel and receiver keep overall weight down compared to a traditional steel-frame Thompson build. 
• Fixed stock and pistol grip use walnut-grain polymer furniture rather than real wood. 
• Feeds from a 10-round stick magazine only; drum magazines will not fit this model. 
• Chambered in .45 ACP, the same cartridge used by the original Thompson submachine gun. 
• Carries the recognizable Tommy Gun silhouette in a rifle-length, semi-automatic configuration.

Owners of the Thompson M1 Lightweight tend to like that it keeps the recognizable Tommy Gun profile without the weight of an original steel-frame Thompson. The aluminum alloy receiver and barrel are a common talking point, since they make the rifle noticeably easier to carry and shoulder through a long range session. Some owners note the polymer furniture doesn't have quite the heft or feel of a real walnut stock, though most find it holds up fine for casual use.

The horizontal foregrip and stock geometry take some getting used to for shooters coming from more modern rifle platforms, but fans of the Thompson design generally enjoy the nostalgia factor. Recoil in .45 ACP is mild for a gun of this weight, which owners appreciate for relaxed plinking sessions.

Being limited to stick magazines only is a common point of feedback, since owners of original Thompsons are used to drum magazine options. Magazine cost and availability for the compatible stick mags is generally seen as reasonable. Most owners view it as a fun range gun rather than a serious defensive rifle.