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.
Firearm Type: AR-15/M-16
Firearm Model: AR10/AR15/M4/M16/M110/SR25
Capacity: AR15/M4 Bolt & Firing Pin