Bilson Arms 9mm FC PCC-UA Pump Style Forward Charging Upper Assembly with 4140 Nitride Coated Chrome Moly Steel Barrel FDE/Black 1 A9UFCFN1001-4140. 5 in Barrel Length: 16 in Barrel Profile: Pencil Barrel Twist Rate: 1-10 Threads per Inch: 1/2x28...
Bilson Arms 9mm FC PCC-UA Pump Style Forward Charging Upper Assembly with 4140 Nitride Coated Chrome Moly Steel Barrel FDE/Black 1 A9UFCFN1001-4140. 5 in Barrel Length: 16 in Barrel Profile: Pencil Barrel Twist Rate: 1-10 Threads per Inch: 1/2x28...