Magpul MAG057-BLK MIAD/MOE Bolt & Firing Pin Core

The Magpul MAG057-BLK is an internal storage core designed for use in Magpul MIAD pistol grips and MOE/MOE-K2 grips. It accommodates one standard AR-15/M4 complete bolt and firing pin in a compact, molded unit. The core is finished in black and constructed from polymer. Note: this storage core is not recommended for use with the MOE+ grip due to its slightly smaller internal dimensions.

Key Specifications

• The material is Polymer.
• The finish is Black.
• Compatible firearm type is AR-15/M-16.
• Compatible firearm models include AR10/AR15/M4/M16/M110/SR25.
• Storage capacity supports one AR15/M4 bolt and firing pin.
• Fitment is for the MIAD Grip and select MOE variants.
• The model designation is MIAD/MOE Storage Core.
• Product type is classified as Grip Accessories.
• The color is Black.
• Manufactured in the USA.

Compact and purpose-built, the MAG057-BLK provides discreet, on-grip storage for a spare bolt and firing pin within compatible Magpul grip systems. Its lightweight polymer construction and low-profile form make it a practical addition to a build or range kit for users who prioritize integrated, reliable storage solutions.