FMK AR-1 Polymer Lower Receiver, 5.56 NATO, Flat Dark Earth

FMK AR-1 Extreme Polymer Lower Receiver

The FMK AR-1 represents a modern approach to AR-15 construction, offering shooters a legitimate alternative to traditional aluminum lower receivers.

Key Features

• Polymer Construction: Engineered from advanced polymer materials for reduced weight without sacrificing durability
• Full AR-15 Compatibility: Works seamlessly with standard AR-15 upper receivers and components
• Flat Dark Earth Finish: Professional, neutral color suitable for tactical or hunting applications
• Proven Design: The AR-1 platform has established itself through extensive field use

Why Choose Polymer?

Polymer lowers offer distinct advantages for certain applications. They reduce overall rifle weight, which matters during extended shooting sessions or when carrying your rifle over distance. The material is corrosion-resistant and requires minimal maintenance compared to aluminum.

Practical Considerations

This lower receiver accepts standard AR-15 fire control groups, buffer tubes, and stocks. Whether you're building a precision rifle, a practical defensive carbine, or a recreational shooter's platform, the FMK AR-1 provides a solid foundation.

The Flat Dark Earth color blends well in varied environments and pairs effectively with most modern tactical furniture and optics.

Build Your Rifle

Pair this lower with your choice of upper receiver to create a complete AR-15 platform tailored to your specific needs and shooting discipline.