Colt M4 Carbine 5.56mm Semi-Auto Lower Receiver Assembly

Factory Colt complete lower receiver assembly to build your AR15, M16 or M4. Compatible with all mil-spec AR15/M4/M16 upper receivers. Manufactured to truly meet and exceed all Mil Spec standards. Marked with highly desirable "M4 Carbine" markings.

This item is a serialized part, considered a firearm and requires transfer through a FFL