Product Description The Rugged Suppressors OP009 OEM Internal Shoulder Piston is built to enhance suppressed pistol performance with a non-slotted design that creates a full circumference gas seal. This improved seal helps drastically lower gas blowback for a cleaner, more comfortable shooting experience. Precision machined from heat-treated 17-4 stainless steel and finished in copper, this durable piston is designed for long service life. This model features 1/2"-28 TPI threads and is intended for use with the Glock 43 and SIG P938. Product Highlights Non-slotted piston design provides a full circumference gas seal to help reduce gas blowback OEM internal shoulder style piston with 1/2"-28 TPI thread pitch Machined from 17-4 stainless steel and heat treated for strength and wear resistance Copper finish for easy identification and a distinctive look Compatible use case noted for Glock 43 and SIG P938 platforms Specs Brand: Rugged Suppressors Product Type: Suppressor piston (internal shoulder) Manufacturer Part Number: OP009 UPC: 859383006631 Thread Pitch: 1/2"-28 TPI Material: 17-4 Stainless Steel (heat treated) Finish/Color: Copper Notes on Use: For use with Glock 43 and SIG P938 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.