JK Armament JK155 Piston .45 Cal .578x28 Stainless Steel - Pistol Booster

The JK Armament JK155 booster piston is a precision-machined component designed to screw onto a threaded pistol barrel. This model fits .45 Cal pistol barrels used with pistol suppressor systems.

Machined from 17-4 PH stainless steel, the JK155 piston threads onto barrels with the standard .578"x28 pattern common to .45 ACP and other large-bore pistol cartridges. It measures 1.55" in diameter.

JK Armament offers the JK155 piston in both 1/2x28 (for 9mm and similar smaller pistol calibers) and .578x28 (for .45 ACP and other larger pistol calibers) thread patterns. Always confirm your barrel thread pitch and host suppressor compatibility before installation.