Home / AR Upper Components / FAIL ZERO M16/M4 BOLT CARRIER GROUP NICKLE BORON BCG View cart “SOLGW GAS TUBE NITRIDE MID LENGTH” 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 LBE Unlimited ARFPN – Firing Pin $7.95 Add to cart Bravo Company Manufacturing GUNFIGHTER Charging Handle 556 Mod 3B – Large Latch $74.95 Add to cart Bravo Company Manufacturing Low Profile Gas Block – .750″ – Set Screw Style $44.95 Add to cart Out of stock SIONICS Upper Receiver Parts Kit $29.95 Read more