Brownells MIL-SPEC Bolt Catch Features The Brownells MIL-SPEC Bolt Catch is CNC machined from an investment casting to mil-spec dimensions ensuring it drops into a standard AR-15 lower receiver without hand-fitting. Heat treating hardens the catch to withstand the repeated impact of the bolt carrier locking back over the life of the rifle resisting the peening and wear that can eventually cause a factory catch to fail. A serrated paddle surface gives the shooter a positive textured grip point for releasing the bolt under stress or with gloved hands. The matte black phosphate finish adds a layer of corrosion resistance while matching standard AR-15 hardware. Made entirely in the USA this bolt catch is a straightforward swap for shooters replacing a worn chipped or malfunctioning factory catch on a mil-spec lower receiver. A reliable bolt catch is essential for correct last-round bolt hold-open which matters both for safety checks and for fast reloads in competition or defensive use. Because it follows mil-spec geometry it is compatible with the vast majority of AR-15 lowers on the market. This part is a dependable no-fuss upgrade for any AR-15 spares kit or build. Brownells MIL-SPEC Bolt Catch Specifications Brand: Brownells Compatible Hosts: AR-15 Material: Steel Finish: Phosphate Color: Gray Surface Texture: Serrated Available At: GrabAGun