Black River Manufacturing Non Ported SBS Benelli M4 12 Gauge Shotgun Barrel 14 in Chrome Linded OD Green BRBMNPBODSBS. ALL NFA RULES APPLY. Black River Manufacturing barrels are drilled from 4140 steel instead of 4130 which has nickel in it which...
Black River Manufacturing Non Ported SBS Benelli M4 12 Gauge Shotgun Barrel 14 in Chrome Linded OD Green BRBMNPBODSBS. ALL NFA RULES APPLY. Black River Manufacturing barrels are drilled from 4140 steel instead of 4130 which has nickel in it which...