Factory Colt M4 Commando complete 5.56mm semi-auto 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 "M4 Commando" model designation. Rare and limited availability with LE serial number prefix.

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