FMK Firearms FMK AR-1 Extreme Strip Lower AR-15 Polymer Lower Receiver Black FMKGAR1E

The AR1 eXtreme is a multi-caliber, MIL-SPEC AR15 lower receiver from FMK Firearms. This made in the USA lower receiver is constructed from a high-impact proprietary composite polymer. The polymer allows for superior strength, unmatched durability and is lightweight at 4.3 oz. This receiver accepts all standard MIL-SPEC uppers up to .50 Beowulf and is compatible with most current AR15 lower parts kits and furniture. Not designed for 9mm carbine builds. The AR1 eXtreme comes with a lifetime warranty. Composite proprietary polymer build;4.3 oz - Accepts all standard MIL-SPEC uppers up to .50 Beowulf;Fits most current AR15 lower parts kits, grips, and stocks (Not compatible with 9mm builds);Lifetime warranty;Custom engraving - "Tree of liberty" quote