The GSG Firefly is a .22 LR pistol with a double action/single action mechanism, 4.9-inch barrel, 10+1 capacity, and matte black finish. It weighs 1.5 lbs. (24.60 oz.) and has a zinc alloy frame and slide. 
 

Key Specifications 

• UPC: 813393019685 
• Caliber: .22 LR 
• Action: Double Action/Single Action 
• Capacity: 10+1 rounds 
• Barrel Length: 4.9 inches 
• Weight: 1.5 lbs (24.60 oz) 
• Finish: Matte Black 
   

Detailed Features 

 
The three-dot sight system includes an adjustable rear sight, which lets you dial in point of impact rather than working around a fixed reference. An ambidextrous thumb safety makes it functional for both left- and right-handed shooters. The frame and slide are zinc alloy, keeping weight down. The black polymer grip gives you a secure hold. 
 

Usage Scenarios 

 
The .22 LR caliber makes this practical for extended range sessions without high ammunition cost. At 24 oz. with a 4.9-inch barrel, it handles comfortably for beginners learning fundamentals or experienced shooters running cheap practice drills. The adjustable sights add some flexibility for precision work. At 7.2 inches overall it's compact enough for casual carry where legal, though .22 LR is not a preferred defensive caliber.

The ATI Firefly .22 LR draws a fairly consistent picture from owners: good value for casual use, with some reliability caveats to be aware of.

Affordability is the most cited positive. It's a budget-friendly .22 that makes range sessions economical, which is the primary reason most buyers choose it. The lightweight design and compact size appeal to newer shooters and those looking for an inexpensive training pistol.

The adjustable sights are appreciated once dialed in, though several users mention the adjustment process is fiddlier than they'd like -- worth knowing before purchase.

Reliability is the most consistent concern. Feeding issues and failures to eject come up with enough regularity to suggest it's not an isolated problem. Most owners report it works fine for casual plinking but note that it may not be the most dependable option for high round counts or critical use. This is worth factoring in if you're buying specifically for training that requires consistent cycling.

The substantial metal construction feels reassuring, and the threaded barrel and decocker are welcome features. Recoil is very mild, making it easy to stay on target. Mine had four or five failures in about 150 rounds, usually while trying to chamber the next cartridge, though the trigger feels comfortable to me.