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