FMK AR1 Extreme Polymer Lower Receiver
Lightweight polymer AR-15 lower receiver made in the USA. Weighs just 4.3 oz, accepts standard Mil-Spec uppers up to .50 Beowulf, and works with most AR-15 parts kits, grips, and stocks.
FMK AR1 Extreme Lower Receiver
The AR1 Extreme represents a modern approach to AR-15 lower receiver design, constructed entirely from high-impact composite polymer manufactured in the United States.
Key Features
- Lightweight Design: Weighs just 4.3 ounces, reducing overall rifle weight without sacrificing strength
- Durable Polymer Construction: High-impact composite material delivers superior strength and exceptional durability
- Wide Caliber Compatibility: Accepts all standard Mil-Spec upper receivers, supporting calibers from .223 Remington up to .50 Beowulf
- Parts Compatibility: Works with most current AR-15 lower parts kits, grips, and stocks for easy customization
- American Made: Manufactured entirely in the USA
Design Details
The receiver features a historically significant Thomas Jefferson quote: "The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants." This engraving reflects the rifle's American heritage and appeals to shooters who value the historical significance of the platform.
Ideal For
The AR1 Extreme is an excellent choice for shooters seeking a lightweight lower receiver without compromising on durability or compatibility. Whether you're building a new rifle or upgrading an existing platform, this polymer lower offers practical advantages for both recreational and serious shooters.
