MM Firefly Stinger Slim Profile Compensator Mag Cap

The MM Firefly Stinger Slim Profile Compensator Mag Cap is the mag cap piece built specifically for the Stinger Slim Profile Kit, and its job is purely about finishing the look — it caps off the end of your build so the whole Stinger silhouette reads as one clean piece rather than looking like separate parts bolted together.

Functionally, it's sized to perfectly hide the MM BCAR inside it, so if you're running the standard MM BCAR your barrel disappears cleanly into the compensator with no gap or rattle. It's not locked to that one part though — the cap will still accommodate whatever PCAR or BCAR you're already running, so you don't need to buy into the MM BCAR specifically just to use this piece.

As a 3D printed accessory in the Firefly Hardware parts range, it's meant to be picked up alongside the rest of the Stinger Slim Profile Kit rather than as a standalone barrel attachment, and it fits onto your build the same way the rest of the kit's parts do.