Product Summary
The CMMG Mk57 AR-15 Stripped Lower Receiver in Armor Black is designed for builders who want to customize their AR lower group to exact specifications. This receiver is engineered to accept standard AR15 accessories, including trigger groups, safeties, and grips. It is specifically designed to pair with CMMG 5.7x28mm Radial Delayed Blowback upper groups. Additionally, it offers maximum compatibility with other firearms that utilize FN Five-seveN pattern magazines. This lower is an ideal choice for enthusiasts looking to create a high-performance 5.7x28mm build.
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