Fletcher Rifle Works Kimura QD Flash Hider 1/2-28 SIG Taper

The Kimura is Fletcher Rifle Works' quick detach flash hider: a muzzle device that kills flash on a bare barrel and doubles as the mounting surface for a suppressor. It is built to work with Plan-B pattern and Q Cherry Bomb adapters, so it drops into a mounting system that plenty of shooters already own instead of locking the rifle into one brand of can.

This one is cut 1/2-28 with a SIG taper shoulder. The shoulder geometry is the part that has to match: get it wrong and the can either will not seat or will not repeat, so order the version that matches the mount you are running. Torque it to the manufacturer's spec against a properly cut barrel shoulder and check the alignment before the first suppressed round.