FMK Firearms AR1 eXtreme .223 Remington Black AR-15 Lower Receiver

The FMK Firearms AR1 eXtreme stripped AR-15 lower receiver is manufactured in the USA from a high impact proprietary composite polymer, delivering extremely lightweight durability at 4.3 oz. Built as a mil-spec AR-15 foundation, it accepts standard MIL-SPEC uppers and is engineered for long-lasting reliability with compatible lower parts kits.

Key features

• Stripped AR-15 lower receiver built on a mil-spec compatible platform
• Proprietary composite polymer construction for superior strength and durability
• Extremely lightweight design at 4.3 oz
• Accepts standard MIL-SPEC uppers up to .50 Beowulf when paired with the correct upper configuration
• Compatible with most current AR-15 lower parts kits, grips, and stocks

Build your next AR-15 project with the FMK AR1 eXtreme polymer foundation and pair it with your preferred upper and components.