Home / Accessory-Lowers / Bushmaster M4 BUILT LOWER RECEIVER 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! Wilson Combat RECEIVER SET AR-15 FORGED $26995 $24830 Sale! Warrior Systems WSM15 BILLET LOWER BLACK $29900 $22259 Sale! Franklin Armory BFSIII LIBERTAS BLR LOWER $62999 $60460