FMK Firearms AR-1 Polymer AR15 Stripped Lower — Blue

Manufactured in the USA from a high-impact proprietary composite polymer, the FMK AR-1 polymer lower receiver offers a balance of strength and low weight for AR15 platform builds. This stripped lower arrives in blue with a matte blued finish and is designed as the foundational component for customized AR projects. The AR-1 eXtreme material emphasizes durability and reduced mass without compromising structural integrity. The lower is supplied with a lifetime warranty.

Key Specifications

• The model is AR-1.
• The lower is intended for .223 Rem / 5.56 NATO caliber configurations.
• Constructed from a high-impact proprietary composite polymer manufactured in the USA.
• The color is Blue.
• The exterior has a Matte Blued finish.
• This item is a Stripped Lower Receiver for AR15 builds.
• The action designation is Semi-Auto when assembled into a complete firearm.
• Designed to be extremely lightweight for reduced overall system weight.
• Backed by a lifetime warranty.
• Suited for custom AR15 platform builds and component-level projects.

As a purpose-built foundation for AR-15 projects, the FMK AR-1 polymer lower combines durable polymer construction with a weight-conscious profile and a lifetime warranty. Its finished appearance and platform compatibility make it a straightforward choice for builders seeking a reliable, lightweight lower for range use, competition-oriented setups, or precision-focused assemblies.

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