Home / Accessory-Lowers / Bushmaster M4 BUILT LOWER RECEIVER You cannot add "Bushmaster A2 BUILT LOWER RECEIVER" to the cart because the product is out of stock. Bushmaster M4 BUILT LOWER RECEIVER$27795 Out of stock SKU: 00-20005-BLK Category: Accessory-Lowers Product ID: 58418 Description Description Related products Sale! Bushmaster BFSIII BUILT LOWER RECEIVER $59395 Original price was: $59395.$56913Current price is: $56913. Sale! Franklin Armory BFSIII LIBERTAS BLR LOWER $62999 Original price was: $62999.$60460Current price is: $60460. Sale! Wilson Combat RECEIVER SET AR-15 FORGED $26995 Original price was: $26995.$24830Current price is: $24830. Sale! Warrior Systems WSM15 BILLET LOWER BLACK $29900 Original price was: $29900.$22259Current price is: $22259.