Builder's Grade 5" 300 Blackout 1:5 Twist Upper Receiver | A2 | 4.25" TR M-LOK | Without Bolt Carrier Group and Charging Handle
This Complete 5 inch M-LOK upper receiver comes with a 4.25 inch free float handguard and is built with only the best Mil-Spec components. The heart of this upper is comprised of a 4150 barrel.
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Barrel
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Specifications
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|---|---|
| Caliber | 300 BLK |
| Length | 5" |
| Material | 4150 Chrome Moly Vanadium |
| Profile | Medium |
| Finish | QPQ Corrosion Resistant |
| Gas System Length | Micro |
| Gas Block Journal | .750" |
| Dimpled? | Yes |
| Twist Rate | 1:5 |
| Muzzle Thread | 5/8x24 TPI |
| Weight | 12oz |
| Barrel Extension | M4 Feed Ramps |
| Target Crown | 11 Degree |
Upper Receiver:
- Machined from a Mil-Spec 7075 T6 forging Hard Coat Anodized per Mil-A-8625F, Type III
- M4 Feed ramps
- Made in the U.S.A.
Handguard:
This 4.25 inch rail is compatible with any Mil-Spec AR15 upper. It features cuts for weight savings and increased strength. Each component is manufactured right here in Florida to precise tolerances for a firm fit and reliable service. The barrel nut and all mounting hardware included.
- 4.25" free float handguard
- MIL-STD 1913 Picatinny rail on top
- 1 M-Lok slots on 3 sides
- Precision Machined 6000 Series aluminum, for high strength and weight savings
- Steel Barrel nut to resist movement under heat
- Made in USA
All NFA/ATF Rules Apply
Depending on your state and local laws, you could use this barrel with a lower receiver that is a Registered SBR, or Pistol. Possession of this barrel along with a Non-NFA lower receiver may be Prohibited. We are not lawyers and the above information is not legal advise. Make sure you understand the most up to date federal, state and local laws before proceeding with this product.
Please Note: Uppers may present light fouling from our quality control process and/or test firing
***Please allow an additional 2-3 business days of lead time as these uppers are made to order.***
