GSG Firefly Threaded Barrel for sale
(20)
ATI GSG Firefly 4.9" .22lr Threaded Barrel Pistol, Black - GERG2210TFF
Brand:
ATI
Action:
Double Action/Single Action
Barrel Length:
4.9in
Caliber:
.22 LR
Capacity:
10
Finish Per Color:
Black
(20)
GSG Firefly .22LR 4.9u201d Barrel Flat Dark Earth Pistol with Threaded Barrel - GERG2210TFFT
Brand:
ATI
Action:
Double Action/Single Action
Barrel Length:
4.5in
Caliber:
.22 LR
Capacity:
10
Finish Per Color:
Flat Dark Earth
(20)
GSG Firefly .22LR Pistol with Threaded Barrel, Green - GERG2210TFFG
Brand:
ATI
Action:
Double Action/Single Action
Barrel Length:
4.5in
Caliber:
.22 LR
Capacity:
10
Finish Per Color:
Green
Marketplace Insights
★ 4.3/5
based on 60 customer reviews across 3 variants from 27 retailers
Excellent budget .22 trainer with solid construction and accuracy, but requires high-velocity ammo and occasional polishing to minimize feed/eject issues.
What customers like
Excellent Value28%
shoots nice. Picky on ammo but a great buy overall
Low Recoil & Accuracy25%
No recoil like you would hope for the price
Ammo Selection Critical23%
just use around 1250 fps .22lr ammo & it will shoot fine
Good for Training20%
Great for teaching a beginner shooter no heavy recoil
Well Made Construction15%
The craftsmanship is impeccable
Common concerns
Feed/Eject Issues32%
Failures to feed and failures to eject/cycle on every mag
Ammo Picky/Finicky28%
very picky about what ammo it likes
Heavy Trigger Pull12%
The trigger is heavy, but breaks clean
Suppressor Cycling Issues8%
after 100 rounds of shooting suppressed it began to choke up
Frequently Asked Questions
GSG Firefly Threaded Barrel for sale
Does the GSG FireFly have a threaded barrel?
Yes, the GSG FireFly comes with a threaded 4.9-inch steel barrel using M9x0.75 right-hand threads, compatible with suppressors and other muzzle devices. All three available variants include this configuration.
What is the thread pitch on a GSG FireFly?
The GSG FireFly barrel features M9x0.75 right-hand threads. Aftermarket adapters can convert this to the more common 1/2x28 standard for use with suppressors and muzzle devices designed for that specification.
What is the GSG FireFly a clone of?
GSG's FireFly is a clone of the Sig Sauer Mosquito, a discontinued .22 LR pistol. GSG developed it after collaborating with Sig Sauer on specifications. The FireFly shares nearly identical internals and externals with the Mosquito, including cross-compatibility with Mosquito magazines.
Is a GSG firefly a good gun?
Opinions vary. Users report reliable performance with quality ammo, good accuracy, and ergonomics mirroring the Sig P226. Some cite early reliability issues. At around $235, it's affordable for range use. Performance depends heavily on ammunition selection and the individual firearm.
How much does a gsg firefly cost?
GSG Firefly pistols typically cost around $218–$229 new, with some retailers listing them near $222. Used examples average around $168–$175. All three variants are available across multiple retailers.
What are the common problems with the gsg Firefly?
GSG Firefly owners commonly report failures to feed, extract, and eject, particularly with hollow points and high-velocity ammunition. Standard velocity rounds like CCI MiniMags tend to run more reliably. Some users also note magazine issues and tight chambers that improve after a break-in period.