Product Description The JK Armament JK155PISTON5X28 Booster Piston is a precision-machined component designed to securely mate your suppressor to a threaded pistol barrel. Crafted from 17-4 PH stainless steel in a raw finish, this piston delivers exceptional durability and corrosion resistance in a compact, purpose-built form. The 1/2"x28 thread pattern ensures broad compatibility with nearly all 9mm pistols and select additional calibers, making it a versatile choice for suppressor users. With a 1.55" diameter and machined slots at the base, this piston integrates reliably into JK Armament&';s suppressor lineup for a stable and secure suppressor-to-barrel connection. Product Highlights Precision machined from 17-4 PH stainless steel for superior strength, durability, and corrosion resistance 1/2"x28 thread pattern is compatible with nearly all 9mm pistols and select other pistol calibers 1.55" diameter with a raw stainless finish provides a clean, secure interface between suppressor and barrel Functions as the core connection component, screwing directly onto the threaded pistol barrel to mate the suppressor Part of JK Armament&';s dedicated Piston series, engineered for reliable and consistent suppressor performance Specs Brand: JK Armament MPN: JK155PISTON5X28 UPC: 850064482065 Caliber: 9mm Luger Series: Piston Color/Finish: Raw Material: 17-4 PH Stainless Steel Firearm Type: Pistol Diameter: 1.55" Thread Pattern: 1/2"x28 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer. ]]>