CMMG CMMG Lower Receiver Parts Kit, 308WIN, Black Finish All the parts you need to get started on your next Mk3 build. Combine this kit with a buttstock kit to complete your lower group. Compatible with CMMG Mk3 Lowers and most LR308 type lowers.Lower Parts Kit Includes: .308 takedown pin .308... Retail: $74.95 Was: Now: $69.95 Add to Cart