The Thompson 1927A-1 Deluxe Lightweight is a semi-automatic .45 ACP carbine built on the classic Tommy Gun design. The aluminum receiver keeps weight to 9.50 lbs despite the 16.5-inch barrel and 41-inch overall length. The drum magazine capacity is 100+1 rounds. 
 

Key Specifications 

• Brand: Thompson 
• Model: 1927A-1 Deluxe Lightweight 
• Caliber: .45 ACP 
• Barrel Length: 16.5 inches 
• Overall Length: 41 inches 
• Capacity: 100+1 rounds 
• Weight: 9.50 lbs (152 oz) 
• Action Type: Semi-Auto 
• Finish: Brown with blued components 
• Stock Material: American Walnut 
• Grip Material: Walnut 
• Sights: Blade Front & Fixed Battle Rear 
   

Detailed Features 

 
The receiver is aluminum with a blued finish. American walnut covers the stock and grip, which gives it the look of the original while keeping the Deluxe Lightweight designation honest on weight. The blade front sight pairs with a fixed battle rear, simple, fast, and consistent with the period design. A muzzle compensator reduces muzzle rise during rapid fire. The manual safety keeps it safe during handling. 
 
The 100-round drum magazine is the attention-getter, though feeding it requires patience during loading. Most owners also run the stick magazines for less ceremony.

Thompson 1927A-1 owners are a pretty specific crowd, people who want to shoot a piece of American firearm history and enjoy that it draws attention at the range. The walnut woodwork and overall craftsmanship get genuine praise, and the shooting experience with .45 ACP from that platform is described as fun rather than purely utilitarian.

On the practical side, the rifle is on the heavier end at 9.50 lbs. The price is a real discussion point; many collectors justify it given the heritage and build quality, while others find it steep for a range carbine. Most feedback reflects strong appreciation for what it is, a historical design you can actually shoot, rather than positioning it as a pure performance tool.