The American Tactical Imports GSG Firefly is a DA/SA semi-automatic pistol chambered in .22 LR, with a 4.9-inch threaded barrel using a 1/2x28 thread pattern. It has an aluminum frame and slide finished in Tan, with textured polymer grips. The pistol carries an integrated Picatinny rail and an adjustable rear sight for windage correction. 
 

Key Specifications 

• Brand: American Tactical Imports 
• Model: GSG Firefly 
• Caliber: .22 LR 
• Barrel Length: 4.9" 
• Finish: Tan 
• Material: Aluminum 
   

Detailed Features 

• 4.9-inch threaded barrel with a 1/2x28 thread pattern accepts compatible muzzle devices 
• DA/SA trigger system pairs with a decocker and an ambidextrous safety lever 
• Adjustable rear sight allows windage correction for the iron sights 
• Integrated Picatinny rail on the frame supports mounting an accessory or optic 
• Textured polymer grips are paired with the tan aluminum frame and slide for handling

Owners of rimfire pistols like the GSG Firefly tend to like them as an affordable way to put more trigger time in without the cost of centerfire ammunition. The DA/SA action on the Firefly draws generally positive comments, with the decocker and ambidextrous safety making it a comfortable trainer for shooters coming from centerfire DA/SA platforms.

Ergonomics get mixed reviews. Some owners like the fuller frame size for a stable, centerfire-style grip, while others feel a rimfire pistol in this size class doesn't need to be quite as substantial. The threaded barrel is a common selling point, letting owners add a compensator or a suppressor for quieter range sessions where local rules allow it.

On value and reliability, .22 LR pistols in general are more ammunition-sensitive than centerfire guns, and Firefly owners often report needing to find a load their particular gun cycles cleanly. Once dialed in, most consider it a solid trainer or plinker, and the tan finish and Picatinny rail add a bit of visual and functional versatility compared to a plain black rimfire pistol.