Home / Accessory-Lowers / Bushmaster M4 BUILT LOWER RECEIVER View cart “Wilson Combat RECEIVER SET AR-15 BILLET” has been added to your cart. Bushmaster M4 BUILT LOWER RECEIVER$27795 Out of stock SKU: 00-20005-BLK Category: Accessory-Lowers Product ID: 58418 Description Description Related products Sale! Wilson Combat RECEIVER SET AR-15 BILLET $48995 $44111 Sale! Bushmaster A2 BUILT LOWER RECEIVER $33995 $33044 Sale! Warrior Systems WSM15 BILLET RECEIVER SET BLK $47900 $37202 Sale! Bushmaster BFSIII BUILT LOWER RECEIVER $59395 $56913