The JK Armament JK155PISTON578X28 Piston 45Cal .578"x28 Stainless Steel For Pistol is a precision-machined booster piston built to keep your suppressed .45 caliber handgun running smoothly. Crafted from durable 17-4 PH stainless steel with a raw, machined finish, it threads directly onto .578"x28 pistol barrels to securely mate your suppressor and host firearm while withstanding heat, fouling, and repeated cycling.

This dedicated piston is ideal for shooters who run .45 ACP or similar larger-than-9mm pistols with a suppressor and need reliable function from a tilting-barrel action. Designed to work within JK’s HUB piston system and compatible .578"x28 threaded barrels, it offers a straightforward way to configure your can for big-bore pistol use at the range or in training. The robust construction and thoughtful engineering reflect JK Armament’s focus on dependable suppressor components and refined machining.

Key Features:

• Manufacturer: JK Armament
• Model: JK155PISTON578X28
• Caliber: 45 Cal
• Thread Pattern: .578"x28
• Material: 17-4 PH Stainless Steel
• Series: Piston
• Finish Color: Raw
• Diameter: 1.55"