Builder's Grade Complete 10.5" 300 BLK Upper Receiver | A2 | 9" M-LOK | With Bolt Carrier Group and Charging Handle
This Complete 10.5 inch M-LOK upper receiver comes with a 9 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 and our black nitride bolt carrier group that is finished with an incredible polish, making the action smooth and easy to keep clean.
| Barrel | Specifications |
|---|---|
| Caliber | 300BLK |
| Length | 10.5" |
| Material | 4150 Chrome Moly Vanadium |
| Profile | Medium |
| Finish | QPQ Corrosion Resistant |
| Gas System Length | Pistol |
| Gas Block Journal | .750" |
| Dimpled? | No |
| Twist Rate | 1:7 |
| Muzzle Thread | 5/8x24 TPI |
| Weight | 20.8oz |
| Barrel Extension | M4 Feed Ramps |
| Target Crown | 11 Degree |
Bolt Carrier Group:
- Enhanced 9310 Steel (Bolt)
- 8620 Tool Steel (Carrier)
- Bolt is shot Peened and MPI
- All BCG components are pre-polished before being processed and then post polished for an incredible shine
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:
- 9" free float handguard
- MIL-STD 1913 Picatinny rail on top
- 3 M-Lok slots on 3 sides
- Precision Machined aircraft grade aluminum, for high strength and weight savings
- Hard Coat Anodized per Mil-A-8625F, Type III, Class 2
- Clamp on system for easy assembly
- Steel Barrel nut to resist movement under heat
- 10 oz with barrel nut and hardware
- 1.35" Inside Diameter
- 1.63" Wide
- Made in USA
Charging Handle:
- Alloy Charging Handle Assembly
- Complete with Standard Latch
- Made from hardcoat anodized aluminum
- Black finish
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.***
