The JK Armament Piston is a precision-machined stainless steel booster piston that screws onto a threaded pistol barrel to mate the barrel and suppressor together for reliable cycling (JK Armament part no. JK155PISTON578X28).
Key Specifications
- Precision machined from 17-4 PH stainless steel
- .578×28 thread pattern
- Sized for .45 ACP and other larger-than-9mm pistol calibers
Frequently Asked Questions
What does a booster piston do? It screws onto the threaded pistol barrel and mates the barrel to the suppressor, allowing the barrel-suppressor assembly to cycle correctly on a semi-auto pistol.
Is this piston itself a regulated NFA item? No — a booster piston is an ordinary Title I mounting accessory that connects a suppressor to a barrel; it is not itself a suppressor or NFA item.
What calibers is the .578×28 thread pattern for? The .578×28 pattern is used on .45 ACP and other pistol calibers larger than 9mm; a separate 1/2×28 piston covers 9mm and similar calibers.
Buy the JK Armament .578×28 Booster Piston for .45 Cal Pistols
Order the JK Armament .578×28 Booster Piston for .45 Cal Pistols from a Lubbock, TX gun shop. Shop more JK Armament parts or browse the Class 3 Parts & Accessories category at Schaefer Defense.
