Home / AR Upper Components / FAIL ZERO M16/M4 BOLT CARRIER GROUP NICKLE BORON BCG View cart “FORWARD CONTROLS DESIGN LDFA-A LOW DRAG FORWARD ASSIST BLACK NITRIDE SERRATED” has been added to your cart. FAIL ZERO M16/M4 BOLT CARRIER GROUP NICKLE BORON BCG$149.99 1 in stock [] FAIL ZERO M16/M4 BOLT CARRIER GROUP NICKLE BORON BCG quantity Add to cart UPC: 881314861781 SKU: 009-FZM16/4-01-NH Category: AR Upper Components Product ID: 11706 Related products Out of stock SIONICS Gas Block Low Profile .750 $29.95 Read more LBE Unlimited ARFPN – Firing Pin $7.95 Add to cart BADGER ORDINANCE Universal Safety Selector $58.00 Add to cart SOLGW Gas Block Low Profile .750 w/ Set screws – V2 $45.00 Add to cart