
| Brand | Other |
| SKU | — |
| UPC | — |
| Action | Double Action |
| Weight | 4.3 ounces |
| Caliber / Gauge | .223 Remington, 5.56 NATO |
| Condition | New |
Firearms ship to the FFL dealer you name at checkout. Price and stock are re-checked live when you order.
The FMK Firearms AR-1 eXtreme stripped lower receiver is an AR-15 pattern foundation built from a proprietary high impact composite polymer. Manufactured in the USA, it’s designed to deliver superior strength, durability, and very low weight for custom builds. This stripped lower accepts standard MIL-SPEC AR-15 uppers and is compatible with most current AR-15 lower parts kits, grips, and stocks, giving you a lightweight starting point with lifetime warranty coverage.
Build your next AR-15 with a lightweight, composite-polymer lower receiver designed for rugged use.