Home / Build Your Own / Ambidextrous Bolt Catch Receiver Cut Service Ambidextrous Bolt Catch Receiver Cut Service$14900 Category: Build Your Own Product ID: 5165 This is the machining service required to install the ambidextrous A5/A7/MR223 etc… HK bolt catch/release. Service only, no parts included. Ambidextrous Bolt Catch Receiver Cut Service quantity Add to cart Description Additional information Description This is the machining service required to install the ambidextrous A5/A7/MR223 etc… HK bolt catch/release. Service only, no parts included. Additional information Weight 38 oz Dimensions 15 × 4 × 8 in