Description
This is the original equipment manufacturer magazine for the GSG Firefly rimfire pistol. It feeds 13 rounds of .22 Long Rifle ammunition and comes with a silver aluminum finish that resists corrosion and keeps the weight down compared to steel alternatives. The magazine features an anti-tilt polymer follower that keeps rounds aligned properly during feeding, so you won't deal with the jams and feeding issues that plague lower-quality rimfire magazines.
Single-stack magazines like this one are straightforward to load and unload, and the simple design means fewer parts to wear out or break. It's the same magazine that ships with the Firefly, so you know it'll work straight out of the box. Whether you're rounding out your spare magazine collection, building a backup gun, or just want to spend more time shooting and less time reloading, having multiple mags on hand is the kind of cheap insurance that pays off at the range.
The Firefly magazine won't fit SIG Sauer 1911-22 models or rimfire 1911s in general, so make sure you're matching it to a GSG Firefly pistol. If you want even more capacity, third-party aluminum base pads and springs can extend the magazine to hold 14 or 16 rounds, though this magazine works great as-is for casual shooting.
Key Specifications
- Manufacturer: American Tactical / ATI (GSG German Sport Guns)
- Manufacturer Part Number: GERMFF13
- UPC: 810113114477
- Caliber: .22 LR (22 Long Rifle)
- Capacity: 13 rounds
- Material: Aluminum
- Finish: Silver
- Follower Type: Anti-tilt polymer
- Magazine Type: Detachable, single-stack
- Firearm Fit: GSG Firefly
- Length: 5.55 inches
- Width: 2.05 inches
- Height: 1.2 inches
- Weight: 0.2 lbs
- Type: OEM Handgun Magazine
What’s Included
- GSG Firefly 13-round magazine
Frequently Asked Questions
Will this magazine work with other .22 pistols?
No, this magazine is designed specifically for the GSG Firefly. It's not compatible with SIG Sauer 1911-22 models, rimfire 1911s, or other .22 pistols. It will fit a SIG Sauer Mosquito if you have one of those older models, but it's built for the Firefly. Always verify compatibility with your specific firearm before purchase.
Can I use this magazine with aftermarket base pads to increase capacity?
Yes. Third-party aluminum base pads and replacement springs can increase the capacity to 14 or 16 rounds depending on which upgrade you choose. The magazine is designed to accept these upgrades, making it a good platform if you want more rounds downrange without buying entirely new magazines.
What's the difference between this 13-round and the standard 10-round Firefly magazine?
This 13-round magazine holds three more rounds than the standard OEM 10-round mag that ships with the pistol. The extra capacity means fewer reloads during range sessions. Both use the same aluminum construction and anti-tilt follower for reliable feeding.
Is the aluminum construction durable enough for regular use?
Aluminum is a solid choice for rimfire magazines. It resists corrosion better than bare steel and keeps the weight down, which matters in a carry gun. The anti-tilt follower adds durability by keeping rounds properly aligned and reducing wear on the magazine body during feeding cycles.
How many magazines should I have for my Firefly?
That depends on how much you shoot. Most folks keep at least two or three mags handy so they can load one while shooting with another. Having spares also means you can rotate them, which extends the life of all your magazines by not wearing them out as quickly.





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