CMMG Bolt Catch Features The CMMG AR-15 Bolt Catch engages the bolt carrier group and holds it open once the magazine runs dry giving the shooter an immediate unmistakable signal that a reload is required. Consistent positive engagement is essential for competitive shooters and defensive users alike since a bolt catch that fails to hold can cost valuable time during a string of fire or a critical reload. This replacement part is manufactured to correctly engage the bolt carrier notch and lock reliably every time. It restores factory-correct function to a rifle whose original bolt catch has become worn chipped or otherwise unreliable. Designed to fit the universal AR-15 platform this bolt catch installs during a routine lower receiver build or as a direct swap for a failing factory part. It is a commonly needed component for anyone assembling a parts rifle from individual components since the bolt catch sees repeated mechanical stress over the life of the rifle. Keeping a quality replacement on hand ensures a worn part never leaves a rifle out of service. This bolt catch is a practical dependable choice for AR-15 owners and builders alike. CMMG Bolt Catch Specifications Brand: CMMG Compatible Hosts: AR-15 Model: Bolt Catch Only Available At: GrabAGun