FMK Firearms AR-1 Polymer AR-15 Lower Receiver – Burnt Bronze

The FMK AR-1 polymer lower is a stripped AR-15 lower receiver manufactured in the USA from a high-impact proprietary composite polymer. It delivers a lightweight foundation for custom builds while maintaining strength and durability. This AR-1 lower is offered in a matte Burnt Bronze finish and ships as a stripped receiver that requires additional components to assemble a functioning rifle.

Key Specifications

• Model: AR-1.
• Product type: Stripped Lower Receiver.
• Caliber/Gauge: .223 REM/5.56 NATO.
• Finish: Matte.
• Color: Burnt Bronze.
• Material: High-impact proprietary composite polymer.
• Origin: Manufactured in the USA.
• Warranty: Lifetime warranty.
• Action (associated classification): Semi-Auto.

As the structural foundation for an AR-15 build, the FMK AR-1 polymer lower provides a reliable, lightweight base that supports a range of component choices. Its USA-made composite construction and lifetime warranty make it a practical option for builders seeking a durable stripped lower with a distinctive Burnt Bronze appearance.