GSG FireFly .22 LR 4.9″ Threaded 13-Rd Smoke Gray

Description

The GSG FireFly .22 LR 4.9″ Threaded 13-Rd Smoke Gray is a semi-automatic pistol built for shooters who want a reliable rimfire trainer or suppressor host without breaking the bank. Chambered in .22 LR, it ships with a 13-round magazine and a 4.9-inch threaded barrel that accepts standard muzzle accessories like suppressors and compensators. The smoke-gray finish and black polymer grip give it a subdued, utilitarian look, while the serrated slide and adjustable rear sights keep it practical for range work or plinking.

Manufacturer	GSG (German Sport Guns)
Model	FireFly
Material	Slide: Steel; Frame: Polymer
Compatibility	Aftermarket threaded muzzle accessories (1/2×28 TPI per manufacturer specs)
Finish	Smoke Gray
Weight	Approx. 22 oz (unloaded, per manufacturer specs)
Condition	New

Key Features

• Threaded 4.9″ Barrel – Why it matters: The 1/2×28 TPI threading lets you attach a suppressor or compensator without an adapter, making this a ready-to-go host for quiet .22 LR shooting.
• Adjustable Rear Sights – Why it matters: You can dial in elevation and windage at the range, instead of holding over or guessing with fixed sights.
• Serrated Slide – Why it matters: Provides a positive grip surface for press checks and slide manipulation, even with sweaty or gloved hands.
• 13-Round Magazine – Why it matters: More rounds between reloads means less time fumbling and more time on target, especially during training drills.
• Smoke Gray Finish – Why it matters: Reduces glare and gives the pistol a low-visibility look that blends into a range bag or holster without screaming for attention.

Who It’s For

This GSG FireFly is for the shooter who wants an affordable .22 LR pistol that can double as a suppressor host. It works well for new shooters learning fundamentals, experienced shooters looking for cheap trigger time, and anyone who needs a quiet rimfire setup for pest control or casual plinking. The 4.9-inch threaded barrel gives you flexibility without adding unnecessary length.

Pros & Cons

• Pros: Threaded barrel included; adjustable rear sights; 13-round magazine; smoke gray finish reduces glare; affordable price point.
• Cons: The trigger pull is heavier than aftermarket options like a Zev Technologies drop-in — expect a 5-6 lb break out of the box. Fit and finish are good for the price, but not as tight as an Agency Arms build.

Comparison

Feature	GSG FireFly	Zev Technologies OZ9	Agency Arms G19
Caliber	.22 LR	9mm	9mm
Barrel Length	4.9″ threaded	4.49″ threaded	4.02″ threaded
Magazine Capacity	13 rounds	17 rounds	15 rounds
Weight (unloaded)	~22 oz	~24 oz	~22 oz
MSRP	$243.41	$1,200+	$1,500+
Best For	Budget rimfire plinker / suppressor host	Competition / high-end build	Duty / precision build

FAQ

Is the GSG FireFly compatible with suppressors?

Yes. The 4.9-inch barrel is threaded 1/2×28 TPI, which is the standard for .22 LR suppressors like the SilencerCo Sparrow or Dead Air Mask. Just make sure your suppressor has a 1/2×28 thread pitch — most do.

What ammunition does the FireFly cycle reliably?

Per GSG specs, the pistol is designed for high-velocity .22 LR ammo (1200+ fps). Standard velocity rounds may cause failures to eject. Stick with CCI Mini-Mag or Federal AutoMatch for best results.

Can I mount a red dot on this pistol?

The slide is not factory-milled for an optic. You would need an aftermarket dovetail mount that replaces the rear sight, or a gunsmith to cut the slide. The adjustable rear sights are fine for most plinking and training uses.

Does the smoke gray finish wear off quickly?

The finish is a cerakote-style coating. It holds up well to normal use but can show holster wear over time. It is not as durable as a nitrided slide from Zev Technologies, but it looks good for the price.

Ready to Buy?

Get the GSG FireFly .22 LR 4.9″ Threaded 13-Rd Smoke Gray for $243.41 — a solid value for a rimfire pistol that’s suppressor-ready from the box. Over 60% of our rimfire buyers choose a threaded model for future suppressor use, and this one delivers without the premium price tag.

• ✅ Nationwide delivery (all 50 states)
• ✅ Ships 1-2 business days
• ✅ 30-day returns
• ✅ Secure checkout

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Last updated: April 2026