Kaw Valley Precision stainless steel suppressor booster pistons are a great option for use on several suppressor platforms. To maintain tight tolerances, KVP pistons are machined in a single Swiss CNC setup. The single setup minimizes the potential for tolerance stack up, in comparison to multi machine production strategies. The pistons are Black Nitride treated to improve durability and wear resistance.KVP Suppressor Pistons are in the pattern known as BPISTIN, an acronym which stands for: Booster Piston, Industry Standard Ten Index Notch Suppressors that can utilize the KVP Gen 2 Piston:Dead Air OdessaGriffin Revolution: Resistance, Optimus 9, and BushwackerSilencer Co: Hybrid, Octane, Omega K, Omega 36MYHM: Booster AssemblyECCO Machine Phoenix Pistol Cans and Booster Assemblies Note: Periodic lubrication of the piston and o-rings are recommended to ensure smooth operation of the booster assembly.