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The Jawbreaker III 16-inch Carbine upper assembly is designed for the discerning AR-15 enthusiast. Chambered in .223 Wylde, it delivers versatility across various ammunition types. The 16-inch heavy (H-Bar) barrel is crafted from 4150 Chrome Moly Vanadium, finished with manganese phosphate for durability, and features a 1:8 twist rate to optimize bullet stability. This carbine-length gas system, with a 0.75-inch gas block, ensures reliable cycling.

The lightweight 15-inch freefloat M-Lok handguard, made from 6061-T6 aluminum, allows for customizable accessory mounting without compromising accuracy. The upper receiver, constructed from 7075 T6 aluminum and finished in anodized black, provides robust performance. Included is a mil-spec quality AR-15 M4 charging handle and a GI birdcage flash hider threaded at 1/2×28. This complete upper build combines functionality with quality materials, making it a solid choice for a range of shooting applications.

Specifications

Caliber: .223 Wylde

Barrel Length: 16-inch

Barrel Material: 4150 Chrome Moly Vanadium

Barrel Finish: Manganese Phosphate

Barrel Profile: Heavy (H-Bar)

Barrel Twist Rate: 1:8T

Barrel Thread Pitch: 1/2×28

Barrel Gas System Length: Carbine

Gas Block Size: 0.75

Upper Receiver Material: 7075 T6 Aluminum

Upper Receiver Finish: Anodized

Handguard Material: 6061-T6 Aluminum

Handguard Length: 15-inch

Handguard Color: Black

Handguard Style: Freefloat, M-LOK

Charging Handle: AR-15 M4 Charging Handle Mil-Spec Quality

Bolt Carrier Material: 9310 Alloy Steel

Bolt Carrier Finish: Nitride

Muzzle Device Details: AR-15 1/2×28 TPI GI Birdcage Flash Hider

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