Magpul MIAD/MOE Bolt & Firing Pin Storage Core AR-15/M4 Black Polymer

The Magpul MAG057 MIAD/MOE Bolt & Firing Pin Core is an internal storage unit that drops into a Magpul pistol grip, turning it into a self-contained carrier for a spare bolt and firing pin. Designed to fit the MIAD GEN 1.1 TYPE 1 grip as well as the MOE and MOE-K2 pistol grips, this core holds one (1) standard AR15/M4 complete bolt and firing pin in a compact, concealed location inside the rifle.

Built from durable black polymer, the storage core adds virtually no bulk to the host grip and keeps essential field-service parts where you need them most. It accepts standard AR-15 and M4 pattern bolts and firing pins, making it a smart, low-profile upgrade for any AR-platform rifle or pistol running a supported Magpul grip.

Manufactured in the USA, the MAG057 is an inexpensive, no-tools way to add redundant fire-control capability to your rifle without carrying a separate spare-parts carrier. Simply swap the grip's standard storage core for this bolt and firing pin core and you're ready to go.