Description
This assembled BCM lower receiver group is configured for AR-15 builds chambered in .223 Remington/5.56 NATO. It includes the BCM MK2 receiver extension, MK2 buffer, and rifle M16 action spring for builders working on a complete lower assembly.
Key Specifications
- The complete lower receiver provides an assembled foundation for an AR-15 build.
- The .223 Remington/5.56 NATO chambering supports the listed cartridge configuration.
- The semi-auto action matches the specified operating type.
- The Flat Dark Earth color provides the listed finish color for a coordinated build.
- The textured finish adds the specified surface treatment.
- The BCM MK2 receiver extension is approximately 3/4 inch longer than a standard 6-position receiver extension.
- The MK2 buffer is included as part of the lower receiver group configuration.
- The rifle M16 action spring is included for the listed assembly.
- The assembled style is suited to builders looking for a complete lower group rather than separate lower components.
This lower receiver group is intended for AR-15 builders who want a defined .223 Remington/5.56 NATO foundation with the BCM MK2 receiver extension system already included.




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