The LAZR 18-inch Rifle-Gas 5.56 NATO AR-15 Upper Build Kit is engineered for precision and reliability. It features an 18" Government Profile Barrel made from 4140 Gun Steel with a nitride finish and a 1:7 twist rate, optimized for the 5.56 NATO caliber. The kit includes a micro low-profile gas block with a .750 OD, and the rifle-length gas system ensures smooth cycling. The upper receiver is constructed from 7075-T6 aluminum with anodized finish, equipped with M4 feed ramps for optimal feeding.
The free float quad rail handguard is made from lightweight 6061-T6 aluminum and comes in a sleek black color. Additionally, the kit incorporates the Breek Arms Plan B Scorch 3-Prong Flash Hider, a compact and low-profile muzzle device with precision-machined prongs, crafted from 4140 hardened steel and finished in nitride for durability. This upper build kit caters to gunsmiths who value performance and freedom in their firearm assembly.
Platform: AR-15
Caliber: 5.56 NATO
Barrel: 18" 5.56 NATO Government Profile Barrel, 1:7 Twist, Nitride, 1/2x28
Barrel Length: 18-inch
Barrel Material: 4140 Gun Steel
Barrel Finish: Nitride
Barrel Profile: Government
Barrel Twist Rate: 1:7
Barrel Thread Pitch: 1/2x28
Barrel Gas System Length: Rifle
Gas Block: Micro Low-Profile Gas Block, .750 O.D Barrel Steel
Gas Block Size: 0.750
Gas System: Rifle
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: Free Float Quad Rail
Handguard Material: 6061-T6 Aluminum
Handguard Color: Black
Muzzle Device: Breek Arms Plan B Scorch 3-Prong Flash Hider
Muzzle Device Details: Compact low-profile 3-prong flash hider with precision-machined prongs
Muzzle Thread Pitch: 1/2x28
Muzzle Device Material: 4140 Hardened Steel
Muzzle Device Finish: Nitride
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