Home / Accessory-Lowers / Ruger LOWER RECEIVER AR-556 5.56MM You cannot add "Bushmaster A2 BUILT LOWER RECEIVER" to the cart because the product is out of stock. Sale! Ruger LOWER RECEIVER AR-556 5.56MM$12900 Original price was: $12900.$10883Current price is: $10883. Out of stock SKU: 8506 Category: Accessory-Lowers Product ID: 44730 Description Description Related products Sale! Warrior Systems WSM15 BILLET RECEIVER SET BLK $47900 Original price was: $47900.$37202Current price is: $37202. Sale! Warrior Systems WSM15 BILLET LOWER BLACK $29900 Original price was: $29900.$22259Current price is: $22259. Sale! Wilson Combat RECEIVER SET AR-15 BILLET $48995 Original price was: $48995.$44111Current price is: $44111. Sale! Bushmaster BFSIII BUILT LOWER RECEIVER $59395 Original price was: $59395.$56913Current price is: $56913.