Product DescriptionThe Stern Defense 9mm PCC bolt is built from 8620 AISI steel and finished with a Nickel Boron/Mag-Phosphate hybrid coating for smooth cycling and corrosion resistance. Designed to fit Mil-Spec and Glock-pattern upper receivers, it functions with Colt SMG and Glock magazines and is fully compatible with standard AR-15/M16 charging handles. This bolt comes fully assembled with key sub-components installed, including the firing pin, firing pin spring and retaining pin, extractor, and extractor spring, plus proprietary center and roll pins. The updated 9mm bolt design is engineered to cater to single-stage triggers with short resets.Product Highlights 8620 AISI steel construction for durability in 9mm AR-pattern PCC builds Nickel Boron/Mag-Phosphate hybrid finish for smooth operation and enhanced wear resistance Fits Mil-Spec and Glock-pattern upper receivers Compatible with Colt SMG and Glock magazines; works with standard AR-15/M16 charging handles Ships fully assembled with firing pin components and extractor installedSpecs Brand: Stern Defense Manufacturer Part Number: 004SDBU9NIBECHOD2M UPC: 860141001546 Caliber: 9mm Firearm Fit: AR15/M16 Material: 8620 AISI Steel Finish: Nickel Boron/Mag Phosphate Hybrid Approx. Dimensions: 7.8 in (L) x 2.4 in (W) x 2.4 in (H) Approx. Weight: 15.5 ozDisclaimer: 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.