The Davidson Defense Last Impact 16-inch Carbine-Gas Upper Build Kit is built for versatility and reliability in AR-15 platforms. This assembly features a 16-inch 4150 CrMoV barrel with a 1:7 twist rate, optimized for 5.56 NATO ammunition. Its carbine-length gas system ensures smooth cycling, while the phosphate finish offers durability against wear. The upper receiver is constructed from 7075-T6 aluminum with M4 feed ramps, anodized for corrosion resistance. A low-profile micro gas block, paired with a 0.750 gas block size, supports the seamless operation of this kit.
The included Keymod handguard provides an extensive mounting platform for accessories, crafted from high-quality materials complete with anti-rotation tabs. Additionally, the setup incorporates a GI birdcage flash hider for effective muzzle control and signature reduction. This upper build kit is engineered to meet the demands of the modern gunsmith who values performance and functionality in a reliable package.
Caliber: 5.56x45mm NATO
Barrel Length: 16-inch
Barrel Material: 4150 CrMoV
Barrel Twist Rate: 1:7
Barrel Gas System Length: Carbine
Barrel Finish: Phosphate
Barrel Profile: M4
Barrel Thread Pitch: 1/2x28
Color: Black
Gas Block Size: 0.750
Gas Block: Micro Low-Profile Gas Block, .750 O.D Barrel Steel
Gas System: Carbine
Muzzle Device: AR-15 1/2x28 TPI GI Birdcage Flash Hider 5.56 .223 A2
Muzzle Thread Pitch: 1/2x28
Upper Receiver: AR-15 Upper Receiver, M4 Feed ramps, 7075 T6 Aluminum, Anodized
Upper Receiver Material: 7075-T6 Aluminum
Upper Receiver Finish: Anodized
Handguard Style: Keymod
Handguard Material: Made in USA YJSJ12 with Anti-Rotation Tabs
Handguard Color: Black
Platform: AR-15
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