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If you've handled a Sig Sauer Mosquito, the GSG FireFly will feel awfully familiar, and that's no accident. GSG built the Mosquito for Sig years back, and when that partnership ended they brought the design back under their own name. The result is a .22 LR pistol styled after the Sig P226, scaled down to roughly 95 percent of the full-size centerfire's footprint, which gives it real heft and presence most rimfires can't match.
This particular model wears a black serrated slide over a smoke-finished zinc alloy frame, with black polymer grips that fill the hand nicely. The 4" steel barrel is fixed and non-threaded, running off a blowback action chambered in .22 LR. You get a 10+1 capacity from a single included magazine, adjustable rear sight paired with a 3-dot setup, and a slide-mounted ambidextrous thumb safety with a decocker. The DA/SA hammer-fired trigger and a magazine disconnect safety round out the controls, and the integrated Picatinny rail up front lets you hang a light or laser without any fuss.
The biggest reason folks reach for the FireFly is the weight. At around 24.6 ounces, it tips the scales close to ten ounces heavier than a Walther P22 or Ruger SR22, so it handles and balances more like a 9mm. That makes it a genuinely useful trainer for newer shooters stepping up to centerfire pistols, while still being cheap to feed for a full afternoon of plinking.
One thing worth knowing up front: the FireFly runs best on high-velocity ammo. GSG recommends 22 LR HV loads in the 36 to 40 grain range, and shooters consistently report the smoothest cycling with rounds like CCI Mini-Mags or Federal Auto Match. Feed it the good stuff and it'll keep up round after round.
It's a solid pick for target practice, training a new shooter, or just having a blast at the range without burning through your ammo budget.
GSG recommends high-velocity .22 LR loads with a minimum velocity around 1,250 FPS and bullet weights in the 36 to 40 grain range. Shooters routinely have the best luck with CCI Mini-Mags and Federal Auto Match. Like most blowback rimfires, it can get finicky with cheap bulk ammo, so feeding it quality HV rounds keeps cycling smooth.
Essentially, yes. GSG manufactured the Mosquito for Sig Sauer, and after that arrangement ended they began selling the same design under the FireFly name. The two are mechanically nearly identical, which also means Mosquito magazines will work in the FireFly.
No, this specific model has a 4" non-threaded steel barrel. GSG offers threaded-barrel versions of the FireFly separately if suppressor or muzzle device mounting is what you're after. This one is the standard sport configuration.
It's a popular choice for exactly that. At roughly 24.6 ounces it's heavier than most .22 pistols and handles much like a full-size 9mm, so it makes a great low-cost trainer for stepping up to centerfire handguns. The full-size grip and familiar P226-style controls help too.
The FireFly ships with one 10-round magazine. A lot of owners pick up a spare or two since extra range time goes faster with more mags on hand. Because it shares its design with the Sig Mosquito, those magazines are compatible as well.
| UPC | 819644027256 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | GERG2210FFS |
| Action | |
| Barrel Length | 4" |
| Caliber/Gauge | .22 LR |
| Capacity | 10 + 1 |
| Color | Black |
| Length | 12.2000 |
| Number of Magazines | 1 |
| Product Type | Pistol |
| Safety | Ambidextrous Thumb |
| Shipping Weight | 2.5 |
| Sights | Adjustable Rear |
| Sights Type | 3-Dot |
| Slide Description | Serrated |
| State Restriction (Guam) | NO SALE TO GUAM |
| State Restriction (PR) | NO SALE TO PUERTO RICO |
| State Restriction (VI) | NO SALE TO VIRGIN ISLANDS |
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