The Mk3 Gun builders kit includes most of the necessary parts to build your lower group except the commonly upgraded parts. Does not include Fire Control Group, and pistol grip. Compatible with CMMG Mk3 Lowers and most LR308 type lowers.

Features :

• All parts meet or exceed mil-spec
• Does not include Fire Control Group and Pistol Grip
• CMMG Mk3 Lowers and most LR308 type lowers