Magpul MAG057-BLK MIAD/MOE Bolt & Firing Pin Core AR10/AR15/M4/M16/M110/SR25 Black Polymer

The Internal core unit for the MIAD as well as the MOE and MOE-K2 Grips is designed to hold one standard AR-15/M4 complete bolt and firing pin. *Note: The Bolt & Firing Pin Storage Core is not recommended for use with the MOE+ Grip due to its slightly smaller internal dimensions required by the rubber over-molding. Made in the USA.