Product Description The SilencerCo AC728 Osprey and Octane Piston Kit is a convenient multi-thread compatibility set designed for use with SilencerCo Osprey and Octane suppressors. This kit includes five pistons plus three O-ring packs, allowing quick changes to match different host firearms and thread patterns. Built from stainless steel and commonly listed with a black nitride finish for enhanced wear resistance, this kit is an ideal solution for maximizing host compatibility while keeping essential replacement O-rings on hand. Product Highlights Complete 5-piece piston kit to expand host thread compatibility for SilencerCo Osprey and Octane suppressors Includes three O-ring packs to support reliable booster/Nielsen device function and maintenance Thread options cover popular pistol and sub-gun mounts: .578x28, 1/2x28, 16mm x 1 LH, 13.5mm x 1 LH, and 9/16x24 Stainless steel construction, often listed as 17-4 stainless and heat treated for durability Commonly listed with a black nitride finish to help improve wear resistance and lubricity Specs Brand: SilencerCo Manufacturer Part Number: AC728 UPC: 817272015294 Product Type: Suppressor piston kit Compatibility: SilencerCo Osprey and Octane suppressors Included Pistons (Qty 1 each): .578x28; 1/2x28; 16mm x 1 LH; 13.5mm x 1 LH; 9/16x24 Included O-Rings: Three O-ring packs Material: Stainless steel (commonly listed as 17-4 stainless) Finish/Color: Commonly listed as black nitride finish, black color 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.