AR-15 M4 COMPLETE LOWER RECEIVER 5.56MM
The Colt AR-15 M4 Complete Lower Receiver is made entirely from 7075-T6 aluminum and features a black hardcoat-anodized finish for added durability.
Marked for 5.56 NATO, single-stage semi-automatic trigger group
Equipped with M4-style buttstock and pistol grip
The Colt AR-15 M4 Complete Lower Receiver is built using the same parts and the same attention to detail as the company's popular line of LE6920 AR-15 rifles.Link to parts manufacturer