Builder's Grade Complete 5" 5.56 1:5 Twist Upper Receiver | A2 | 4.25" M-LOK With Built-in Handstop | with 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 and our black nitride bolt carrier group that is finished with an incredible polish, making the action smooth and easy to keep clean.
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Barrel
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Specifications
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|---|---|
| Caliber | 5.56 |
| Length | 5" |
| Material | 4150 Chrome Moly Vanadium |
| Profile | Medium |
| Finish | QPQ Corrosion Resistant |
| Gas System Length | Micro |
| Gas Block Journal | .750" |
| Dimpled? | No |
| Twist Rate | 1:5 |
| Muzzle Thread | 1/2x28 TPI |
| Weight | 12oz |
| 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:
This 4.25-inch octo rail is compatible with any mil-spec AR15 upper. Each component is manufactured right here in Florida to precise tolerances for a firm fit and reliable service. The tapered barrel nut and all mounting hardware is included.
- 4.25" free float handguard
- Built-in Handstop
- MIL-STD 1913 Full Picatinny rail on top
- 1 M-Lok slot on 7 sides
- Precision Machined 6000 Series aluminum, for high strength and weight savings
- Clamp on system for easy assembly
- Steel Barrel nut to resist movement under heat
- Made in the USA
Tapered Barrel Nut:
Designed specifically for seamless integration with micro-length gas systems. Crafted from high-quality steel for maximum durability, this barrel nut features a unique tapered design that offers superior clearance for micro-length gas tubes, eliminating the need for modifications during installation.
- Optimized Clearance: The tapered end ensures smooth and unobstructed passage of the gas tube, preventing interference and enhancing cycling reliability in compact builds
- Ease of Installation: Designed for hassle-free assembly, this barrel nut simplifies your build process by eliminating the need for custom fitting or adjustments
- Versatile Compatibility: Ideal for PDW and ultra-compact AR-15 configurations, the tapered design accommodates various handguard setups, making it a versatile choice for any build
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.***
