JK Armament 155 HUB Piston Mount 9mm 1/2-28

Short recoil pistols need a booster to keep cycling once a can is hanging off the muzzle. This piston mount does that job on the JK 155 and on any other suppressor cut with HUB threads and roughly 1.8 inches of internal room for the booster housing. It threads into the base of the tube in place of a taper mount or other rear accessory, then screws onto a 1/2-28 host barrel.

Letting the suppressor float free of the barrel as it tilts is what keeps Glock, Sig and most other modern centerfire pistols running at normal speed instead of short stroking. The housing pairs an aluminum body with a stainless steel piston, finished in black nitride.