Stock Status: Diamond Back 4.5" 9mm Medium Profile BARREL + 9mm Slick Side Upper Receiver Combo
This combo kit comes with a 4.5" 9mm DiamondBack Barrel and a SlickSide 9mm (.22LR compatible) upper receiver. The Diamondback Firearms 9mm Barrel is machined in house on state-of-the-art CNC machines and are thoroughly inspected at multiple stages of the build process to ensure quality. This 4.5” barrel is machined from 4150 Chrome Moly Vanadium Steel and has a 1:10 twist rate. It is threaded 5/8x24. The final process is a salt bath Nitride finish for an added layer of protection.The RTB Upper is made from forged 7075-T6 aluminum and is Hard Coat Anodized. It meets military specifications and comes in a slick side configuration. The ejection port door is sized for 9mm and 22LR. This upper does have a shell deflector, but does not have a forward assist.Features:
| Barrel | Specifications |
|---|---|
| Caliber | 9mm |
| Length | 4.5 |
| Material | 4150 Chrome Moly Vanadium |
| Profile | Straight |
| Finish | QPQ Corrosion Resistant |
| Gas System Length | None |
| Gas Block Journal | N/A |
| Dimpled? | No |
| Twist Rate | 1:10 |
| Muzzle Thread | 1/2x36 TPI |
| Weight | 8.3oz |
| Barrel Extension | Integrated |
| Target Crown | 11 Degree |
Upper
- Machined from a Mil-Spec 7075 T6 forging
- Type III Hardcoat Anodized finish
These uppers are machined to extremely tight tolerances for a more accurate build. Seating the barrel may take additional force. Light taps with a rubber mallet will do the trick.
Please Note: These uppers are only compatible with .22LR and smaller pistol caliber rounds, such as 9mm and .40
