Product Description The JK Armament JK155PISTON578X28 Booster Piston is a precision-machined firearm accessory designed for reliable suppressor integration on pistols chambered in .45 ACP and other larger-than-9mm calibers. Manufactured from 17-4 PH stainless steel in a raw finish, this piston screws directly onto your threaded pistol barrel, securely mating the suppressor and pistol together. With a .578"x28 thread pattern and a 1.55" diameter, it is an essential component for shooters looking to properly mount a pistol suppressor with confidence and precision. Product Highlights Precision machined from durable 17-4 PH stainless steel for long-lasting performance and corrosion resistance Features .578"x28 thread pattern, compatible with .45 ACP and select larger-than-9mm pistol calibers 1.55" diameter piston designed to securely mate suppressor and threaded pistol barrel Raw finish for a clean, uncoated appearance suitable for further customization or use as-is Purpose-built booster piston from JK Armament, a trusted name in suppressor components and accessories Specs Brand: JK Armament MPN: JK155PISTON578X28 UPC: 850064482072 Caliber: .45 Cal Thread Pattern: .578"x28 Diameter: 1.55" Material: 17-4 PH Stainless Steel Finish/Color: Raw Series: Piston Firearm Type: Pistol 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. ]]>