The Rock River Arms Tactical Carbine Complete Upper Receiver, in black, features a chrome moly 16" bull barrel chambered in .458 Socom, with a 1:14 twist. It includes a bolt carrier group, charging handle assembly, an anodized RRA 15 free float M-LOK handguard, and an Operator muzzle brake.
Specs
| Model No. | RRASOC0564 |
| Model | Tactical Carbine |
| Manufacturer | Rock River Arms |
| Color | Black |
| Caliber | 458 Socom |
| Barrel Length | 16 |
