Radical's AR-15 MHR complete upper features a 18" stainless steel barrel, black hardcoat anodized receiver and 15" free- float Radical Firearms MHR (MLOK Hybrid Rail) handguard, and a stainless pepper pot muzzle brake.
| Caliber | 224 Valkyrie |
| Model | MHR |
| Series | Upper |
| Type | Complete |
| Barrel Length Range | 18" to 18.99" |
| Sights | None, Optic Ready |
| Muzzle | Pepper Pot Muzzle Brake |
| Firearm Fit | AR-15 |
| Handguard Finish | Black Anodized |
| Handguards | 15" MHR |
| Receiver Finish | Black Anodized |
| Receiver Material | 7075-T6 Aluminum |
| Twist | 1:7" |
| Barrel Description | Medium Contour |
| Barrel Finish | Stainless Steel |
| Barrel Material | 416R Stainless Steel |
| Barrel Length | 18" |
