Details
The Jawbreaker IV 16-inch carbine gas AR-15 upper build kit is engineered for performance and versatility. Featuring a 1:8 twist rate and a .223 Wylde chamber, this kit accommodates .223 Remington cartridges. The robust 16-inch HBAR barrel is constructed from 4150 Chrome Moly Vanadium steel and treated with a manganese phosphate finish for durability. The upper receiver is made from 7075 T6 aluminum and finished with anodized coating to withstand wear.
This build kit includes a freefloat M-Lok handguard, allowing for flexible accessory mounting while maintaining accuracy. The carbine-length gas system ensures reliable cycling of rounds, complemented by a 0.75 gas block size. It also comes with a GI Birdcage flash hider, threaded 1/2×28 for easy attachment. Ideal for gunsmiths, this kit is a solid choice for those looking to assemble a high-quality AR-15 platform.
Specifications
Platform: AR-15
Caliber: .223 Wylde
Barrel Length: 16 inches
Barrel Material: 4150 Chrome Moly Vanadium
Barrel Finish: Manganese Phosphate
Barrel Profile: Heavy (H-Bar)
Barrel Twist Rate: 1:8
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 Style: Freefloat M-Lok
Muzzle Device: AR-15 1/2×28 TPI GI Birdcage Flash Hider
Muzzle Device Finish: Manganese Phosphate
Muzzle Device Thread Pitch: 1/2×28
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