Home / Accessory-Lowers / Bushmaster M4 BUILT LOWER RECEIVER View cart “Franklin Armory BFSIII LIBERTAS BLR LOWER” 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! Warrior Systems WSM15 BILLET RECEIVER SET BLK $47900 $37202 Sale! Franklin Armory BFSIII LIBERTAS BLR LOWER $62999 $60460 Sale! Warrior Systems WSM15 BILLET LOWER BLACK $29900 $22259 Sale! Bushmaster BFSIII BUILT LOWER RECEIVER $59395 $56913