JK Armament Piston 45Cal .578"x28 Nitride Stainless Steel For Pistol

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Jk Armament JK155PISTON578X28BN Piston 45Cal .578"x28 Nitride Stainless Steel For Pistol

Precision machined from 17-4 PH stainless steel, JKs booster piston is the component that screws onto the threaded pistol barrel, mating suppressor and pistol together. The pistons are available in 1/2x28 threads (nearly all 9mm and some other pistols) and .578x28 threads (.45 ACP and some other larger-than-9mm pistol calibers).