Description
There is a reason the GSG Firefly keeps showing up at rimfire nights and beginner classes. It is a full-size, hammer-fired .22 LR pistol built by German Sport Guns and imported by American Tactical, and it carries the DNA of the old SIG Mosquito, which GSG manufactured back in the day. That means real DA/SA trigger work, a slide-mounted safety, and a decocker, all in a platform that costs pennies per trigger pull to run. This version stands out even more thanks to its mint green frame paired with a black serrated slide, a combo that gets noticed at the range without trying too hard.
Why the Threaded Barrel Firefly Earns Its Spot
The 4.9 inch hammer-forged barrel is fixed to the frame, which is a big part of why this little blowback pistol shoots straighter than its price tag suggests. The threaded muzzle means you can add a suppressor or other rimfire muzzle device whenever you are ready, and quiet .22 LR through a can is about as much fun as you can have on a Saturday morning. An adjustable rear sight lets you dial in your point of impact for whatever ammo your pistol likes best, and the frame-mounted accessory rail takes a light or laser if you want to run one.
Training Value in a Mint Green GSG Firefly
Because the Firefly mirrors the size, weight, and control layout of a metal-framed duty pistol, it is a smart tool for teaching new folks the DA/SA manual of arms before moving them up to centerfire. The alloy frame gives it a substantial, grown-up feel in the hand, and the textured grip keeps it planted through long plinking sessions. With 13+1 on tap from the included magazine, you spend more time shooting and less time reloading.
Feeding and Care Tips
Like most blowback rimfire pistols, the Firefly runs happiest on high-velocity .22 LR ammunition, so stick with quality HV loads and keep the pistol reasonably clean. Do that and this thing will burn through bricks of ammo and keep asking for more.
Key Specifications
- Manufacturer: American Tactical / GSG (German Sport Guns)
- Model: GSG Firefly
- MPN: GERG2213TFFMA
- UPC: 810113113982
- Caliber: .22 LR (high velocity recommended)
- Action: Semi-Auto, DA/SA, Hammer Fired Blowback
- Capacity: 13+1
- Barrel: 4.9" Hammer-Forged, Fixed, Threaded
- Frame: Mint Green Alloy with Accessory Rail
- Slide: Black Serrated Alloy
- Sights: Adjustable Rear
- Safety: Slide-Mounted Ambidextrous Safety with Decocker
- Weight: Approx. 24.6 oz
- Magazines Included: 1
What’s Included
- GSG Firefly .22 LR pistol
- One 13-round magazine
- Owner's manual
Frequently Asked Questions
Is the GSG Firefly good for new or first-time handgun owners?
It is one of the better rimfire trainers out there for that job. The Firefly mimics the size and control layout of full-size metal-framed DA/SA pistols, so new folks learn a real double-action trigger, a decocker, and a manual safety without the recoil or ammo cost of centerfire. It is also just a fun plinker for experienced hands.
What ammo runs best in the GSG Firefly 22LR?
Like most blowback .22 pistols, the Firefly is designed around high-velocity .22 LR ammunition. Standard velocity and subsonic loads may not cycle the slide reliably, especially when the gun is dirty. Feed it quality HV rounds like CCI Mini-Mags and it will hum along all day.
Can I put a suppressor on this Firefly?
Yes, this model has a factory-threaded 4.9 inch barrel made for exactly that. Because the barrel is fixed rather than tilting, it pairs nicely with a lightweight rimfire can and stays accurate with one attached. Just double-check that your suppressor or adapter matches the barrel's thread pattern before mounting up.
Does the mint green GSG Firefly come with a magazine?
It ships with one 13-round magazine, giving you 13+1 total capacity with a round chambered. Extra Firefly magazines are available if you want to load up a few before heading to the range, which we always recommend for rimfire pistols.




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