•1/2×28 SN (for use w/For Glock 43 & Sig P938)

•Constructed from 17-4 stainless steel then heat treated for maximum durability

•The piston is part of the Neilsen device that moves & allows semi-automatic cycling but it also contains the female threads that attach to the muzzle of the host pistol or sub-gun

•Pistons are compatible with the following suppressors: Octane Series Osprey Series Hybrid & Omega 9k