MM Compensator Fit Guide: Harrier, Seagull and Firefly Compared
Match MM compensators to Harrier, Seagull and Firefly configurations using barrel length, body dimensions and BCAR clearance before ordering muzzle parts.
Click to zoom
In stock
The MM Firefly Magazine Follower Cap sits on top of the magazine follower inside the Firefly's magazine tube, and it's what actually makes contact with the shells as the follower pushes them forward — without it, the follower can't push your shells out of the magazine tube properly. It's the companion part to the Magazine Follower listing, so if you're ordering a replacement follower for your Firefly, you'll need this cap alongside it to complete the assembly.
It's currently offered in Black only. Fitment is specific to the Firefly magazine tube, so it drops straight into place on top of the follower with no trimming or extra hardware needed — just seat it, and the follower assembly is ready to reload.
Match MM compensators to Harrier, Seagull and Firefly configurations using barrel length, body dimensions and BCAR clearance before ordering muzzle parts.
Compare the in-stock Firefly's shell-loading routine with a magazine-fed alternative before planning darts and spares. Use the item-specific checklist.