JK ARMAMENT JK155PISTON578X28 | .45 Cal .578×28 Piston

This JK ARMAMENT JK155PISTON578X28 is a precision-machined piston designed to screw onto a threaded pistol barrel and provide the mechanical interface between a pistol and a suppressor. It is manufactured from 17-4 PH stainless steel for corrosion resistance and dimensional stability. The piston uses a .578×28 thread pattern and is intended for pistols chambered in .45 ACP and other pistols that use the same thread specification.

Common applications include mounting a suppressor for range shooting where local law permits and use in competition configurations that employ threaded barrels and muzzle devices.

Product Specifications

• The manufacturer is JK ARMAMENT.
• The manufacturer part number is JK155PISTON578X28.
• The piston is precision machined from 17-4 PH stainless steel for strength and corrosion resistance.
• The thread pattern is .578×28, intended to mate with barrels and accessories using that thread.
• The product is specified for .45 Cal pistols and other pistols that share the .578×28 thread specification.
• The piston functions as the component that screws onto the threaded pistol barrel to mechanically mate the suppressor and pistol.
• The material listed by the distributor is Stainless Steel.
• The item category is Class 3 Parts & Accessories.
• The UPC is 850064482072.

This piston offers a straightforward, robust interface for pistols with compatible threading. Its 17-4 PH stainless construction and precise machining make it suitable for applications where durable, repeatable alignment between a pistol and muzzle accessory is required. If your pistol uses a .578×28 threaded barrel, this part provides a clean, factory-style method to mate a suppressor or other threaded device.