Home / Accessory-Lowers / Franklin Armory BFSIII M4-BLR LOWER SBM4 # You cannot add "Bushmaster A2 BUILT LOWER RECEIVER" to the cart because the product is out of stock. Sale! Franklin Armory BFSIII M4-BLR LOWER SBM4 #$52499 $51924 Out of stock SKU: 00-30007-BLK Category: Accessory-Lowers Product ID: 28719 Description Description Binary Trigger EquippedSpecialized Tension ScrewSBM4 Brace Related products 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 Sale! Bushmaster A2 BUILT LOWER RECEIVER $33995 $33044