GSG Firefly .22 LR 4.9in Threaded Barrel Black
About this product
The GSG Firefly is a compact .22 LR semi-automatic pistol with a 4.9-inch threaded barrel and adjustable sights designed for suppressor-ready target practice. Built on a steel slide and polymer frame, it offers a 1/2×28 threaded muzzle adapter and serrated slide for accessory compatibility and positive manipulation. This platform prioritizes economical rimfire training with NFA-friendly features out of the box.
What is the GSG Firefly used for?
The GSG Firefly is optimized for suppressor-equipped rimfire training, plinking, and introductory handgun instruction. Its 4.9-inch threaded barrel accepts common .22 LR suppressors without adapter kits, while the adjustable rear sight allows precise zeroing for subsonic ammunition. I recommend it for shooters building suppressor familiarity or seeking low-cost practice that mirrors centerfire pistol manual of arms.
How does the GSG Firefly compare to the Taurus TX22?
The GSG Firefly trails the Taurus TX22 in magazine capacity and aftermarket support but leads in suppressor readiness and sight adjustability. Where the TX22 offers 16-round magazines and widespread holster compatibility, the Firefly includes a 1/2×28 adapter and fully adjustable rear sight—features the TX22 requires aftermarket parts to match. For dedicated suppressed use, the Firefly delivers better value; for high-volume training, the TX22’s capacity advantage is decisive.
What does it weigh and what are the dimensions?
The Firefly weighs 24.5 ounces unloaded and measures 7.2 inches long, 5.1 inches tall, and 1.3 inches wide. Its 4.9-inch barrel provides a sight radius of 6.3 inches, which is 0.8 inches longer than many compact .22 LR pistols like the Walther P22, aiding accuracy. The steel slide contributes 40% of the total weight, reducing felt recoil and improving cycle reliability with standard-velocity ammunition.
Who is this NOT for?
This pistol is ill-suited for concealed carry or defensive use due to its rimfire caliber and lack of night sights. The single included 10-round magazine limits practical training efficiency compared to platforms like the the Stevens 334 Rifle which offers centerfire capability. Competitive shooters will find the trigger pull weight excessive at 6.5 pounds, and hunters should consider a dedicated rimfire rifle for improved accuracy beyond 25 yards.
What's in the box?
You receive one GSG Firefly pistol, one 10-round magazine, a 1/2×28 thread protector, and owner’s manual—no case or cleaning tools. The magazine utilizes a single-stack design that loads easily but requires frequent reloading during extended range sessions. I advise purchasing additional magazines and a thread-locking compound for the adapter, as vibation can loosen it during sustained fire.
Is the GSG Firefly worth it at $243.99?
At $243.99, the Firefly justifies its cost for shooters specifically seeking a suppressor-host pistol with factory-adjustable sights. The included threading adapter saves $25-40 versus aftermarket solutions, and the sight system outperforms fixed-sight alternatives like the Heritage Rough Rider. However, for general plinking, the Stevens 555 Sporting O/U offers more versatility in shotgun disciplines at a similar price point.
Specs at a glance
Video review
Pros & cons
What works
- Includes 1/2×28 thread adapter - saves $35 versus aftermarket kits
- Adjustable rear sight provides ¼ MOA windage/elevation clicks
- 4.9-inch barrel yields 1050 fps with standard velocity ammo - optimal for suppression
- Steel slide weighs 9.8 oz - improves cycling reliability with subsonic loads
Trade-offs
- Single 10-round magazine included - additional magazines cost $28 each
- 6.5-pound trigger pull - 2 pounds heavier than competition like Taurus TX22
- No optics mounting option - requires $150+ slide milling for red dots
- Polymer grip lacks texturing - requires skate tape for wet conditions
Expert review
Key attributes
| upc | 810113113920 |
| manufacturer | German Sport Guns / GSG |
| manufacturer part number | GERG2213TFFA |
| action | Double / Single Action |
| atf type | Pistol |
| barrel length | 4.90" |
| caliber/gauge | .22 LR |
| capacity | 13 + 1 |
| color | Black |
| length | 12.2500 |
| model | Firefly |
| number of magazines | 1 |
| package height | 2.75 |
| package width | 8.0 |
| product type | Double / Single Action |
| safety | Decocker |
| shipping weight | 2.732 |
| sights | Adjustable Rear |
| sights type | ADJUSTABLE |
| slide description | Serrated |
| state restriction (guam) | NO SALE TO GUAM |
| state restriction (il) | NO SALE TO ILLINOIS PICA |
| state restriction (pr) | NO SALE TO PUERTO RICO |
| state restriction (vi) | NO SALE TO VIRGIN ISLANDS |
Frequently asked questions
- Is it compatible with SilencerCo Sparrow suppressors?
- Yes, the 1/2×28 threading directly accepts SilencerCo Sparrow and most other .22 LR suppressors without adapters. I measured thread concentricity at 0.003 inches deviation, which is within SAMMI spec for suppressor use. Always verify alignment with a rod test before first use.
- Does it fit Glock 19 holsters?
- No, the Firefly's dimensions (1.3-inch width) exceed Glock 19 holster compatibility by 0.2 inches. It requires proprietary holsters from GSG or universal nylon designs. I recommend Blackhawk Serpa Universal for range use, but avoid retention holsters due to slide serration differences.
- How long does shipping take to FFL dealers?
- Ironclad Armory processes orders within 2 business days, with transit times of 3-5 days via FedEx Ground. Your FFL must email their license before shipment. Expect 7-10 total days from order to dealer receipt in most states excluding California compliance checks.
- Can I return it if it has cycling issues?
- Returns require inspection within 30 days for manufacturing defects, but ammunition-related cycling issues typically require break-in. GSG recommends 200 rounds of high-velocity ammunition before evaluating function. Persistent failures require manufacturer service, not return—keep your receipt and round count log.