The Voidbreaker 16-inch Carbine-Gas Upper Build Kit is engineered for AR-15 builders who demand precision and versatility in their custom configurations. Chambered in .223 Wylde, this kit features a 16-inch barrel with a 1:8 twist rate, optimized to deliver exceptional accuracy with both .223 Remington and 5.56 NATO ammunition. Constructed from 4150 Chrome Moly Vanadium with a phosphate finish and M4 contour profile, the barrel provides durability and reliable performance across varied conditions. The carbine-length gas system paired with a micro low-profile steel gas block (0.750) ensures smooth, consistent cycling. Built on a 7075-T6 aluminum stripped upper receiver with M4 feed ramps and anodized finish, this kit offers corrosion resistance and dependable feeding. The aluminum freefloat M-Lok handguard provides a lightweight, modular platform for accessory attachment and improved handling. Included is a 1/2x28 GI birdcage flash hiderfor effective muzzle flash reduction. Available in multiple configuration options, the Voidbreaker upper build kit delivers a solid foundation for custom AR-15 projects.
The 16-inch barrel features an M4 contour profile that delivers the ideal balance between rigidity and maneuverability, finished with a durable phosphate coating for corrosion protection and extended service life. The 1:8 twist rate stabilizes a wide range of bullet weights, from lightweight 55-grain plinking rounds to heavier 77-grain match ammunition. The carbine-length gas system with micro low-profile steel gas block (0.750) ensures smooth, consistent cycling while keeping the profile slim beneath the handguard.
The aluminum freefloat M-Lok handguard eliminates barrel contact for improved accuracy potential while providing a lightweight, modular mounting platform. The M-Lok slots allow for direct attachment of accessories at multiple positions, reducing bulk and maintaining a streamlined profile. The freefloat design also enhances thermal management, keeping heat away from the shooter's hand during extended shooting sessions.
Machined from 7075-T6 aluminum and treated with a hard anodized finish, the stripped upper receiver features M4 feed ramps for reliable feeding with a wide variety of ammunition profiles. The anodized surface provides excellent corrosion resistance and a durable foundation for your custom build. This upper receiver accepts standard AR-15 charging handles and bolt carrier groups.
The included GI birdcage flash hider threaded 1/2x28 effectively reduces muzzle flash while protecting barrel threads when not using alternative muzzle devices. This standard A2-style flash hider provides proven performance and can be easily replaced with suppressors or muzzle brakes as your needs evolve.
Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Verify compatibility before purchase.
Caliber: .223 Wylde
Barrel Length: 16-inch
Barrel Material: 4150 Chrome Moly Vanadium
Barrel Twist Rate: 1:8
Barrel Finish: Phosphate
Barrel Thread Pitch: 1/2x28
Barrel Profile: M4 Contour
Barrel Gas System Length: Carbine
Gas Block Size: 0.750
Gas Block Name: Micro Low-Profile Gas Block for .750 O.D Barrel Steel
Muzzle Device: AR-15 1/2x28 TPI GI Birdcage Flash Hider 5.56 .223 A2
Muzzle Thread Pitch: 1/2x28
Upper Receiver Name: AR-15 Upper Receiver, M4 Feed ramps, 7075 T6 Aluminum, Anodized
Upper Receiver Material: 7075-T6 Aluminum
Upper Receiver Finish: Anodized
Handguard Material: Aluminum
Handguard Color: Black
Handguard Style: M-Lok
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