Product Description The CMMG Bolt Catch for the AR-15 is a precision-manufactured replacement part engineered to deliver dependable performance in standard AR-15 platform rifles. This critical lower receiver component holds the bolt carrier group open after the last round is fired, giving the shooter a clear visual and tactile indication that the magazine is empty. Built by CMMG, a trusted industry leader in AR-15 parts and accessories, this bolt catch is manufactured to mil-spec standards and is designed for a straightforward, drop-in installation with no gunsmithing required. Product Highlights Direct drop-in replacement bolt catch engineered for standard AR-15 lower receivers Automatically locks the bolt carrier group open after the last round is fired Manufactured by CMMG to mil-spec standards for consistent reliability and long-term durability Lightweight construction at just 0.10 lbs, minimizing any added weight to the rifle Compact and precise dimensions (6.00 x 4.00 x 0.25 cm) for a proper mil-spec fit Specs Brand: CMMG Manufacturer Part Number (MPN): CMM55CA56D UPC: 810046234754 Compatible Platform: AR-15 Weight: 0.10 lbs Dimensions: 6.00 x 4.00 x 0.25 cm 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.