FMK AR-1 Extreme Complete Lower Receiver – Multi Caliber – Magpul UBR – FDE

This is a no-reserve penny auction for an FMK AR-1 Extreme Multi Caliber Lower Receiver. Serial number- FDE6109. This lower is in good condition and comes with a Magpul UBR Gen1 collapsable stock. The AR1 eXtreme Lower Receiver, proudly made in the USA, combines unmatched durability and lightweight construction, weighing just 4.3 oz. Crafted from a proprietary composite polymer, it resists dents and returns to shape under extreme conditions. Compatible with most MIL-SPEC components and standard uppers (up to .50 Beowulf), it includes a Magpul UBR Gen 1 stock for enhanced balance and ergonomics. Designed for use as a rifle platform, it features custom engraving with the quote: "The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants." This lower receiver offers a solid foundation for your AR15 build!