Add an extra 6 rounds capacity to your GSG Firefly .22LR magazine with this precision basepad and follower kit from Taylor Tactical Supply.
Will convert a 10 round magazine into a 16 round magazine, slide at rear. If loading slide forward please limit to 15 rounds.
Please note the base pad is for standard GSG Firefly models and will not fit UK spec LBP versions without minor modification to the back to allow clearance.
The kit includes the TTS +4 follower and extended aluminium baseplate.
- Converts 10 round factory magazines into 16 round magazines
- Suitable for LBP pistols
- More durable than plastic base pads
- Easier to grip for mag changes
- Includes correct allen key for fitting
The follower replaces the standard follower and thumb assist, allowing room for an extra 4 round of .22LR.
This means the thumb assist operated last round lockback will not operate, instead the follower is designed to rise and block the slide going forward. Please note that this will release the slide when removing the magazine unless the slide lock is manually engaged.
For best results TTS recommend reversing the direction of the magazine spring so the top of the spring points to the rear.
Fits magazines for both the GSG Firefly and Sig Sauer Mosquito.
GSG 2025 magazine update
GSG refreshed their Firefly magazine body (part number 400.10.02) in 2025. If you have the newer magazine the front of the follower will need a light sand with some oxide paper for clearance. Older magazines do not need this.
Put some fine grit oxide paper on a flat surface and wipe the front edge of the follower across it a few times to gently relieve the rounded front profile until it is moving smoothly in the magazine with the spring fitted. Very easy, you could also use a small file.
The base plate will need a small notch filing in the back of the magazine to allow full clearance of the locking grub screw if needed. Use a small round file to add this.