The Final Gravity 16-inch Carbine-Gas .338 ARC AR-15 Upper Build Kit is engineered for accuracy and versatility. It features a 16-inch HBAR (Heavy Barrel) crafted from 4150 CMV Steel with a Parkerized finish, providing durability and resistance to wear. The 1:8 twist rate optimizes bullet stability and precision, while the Carbine-Length gas system ensures reliable operation. Included is a micro low-profile gas block (0.750") paired with a standard AR-15 5/8x24 TPI GI Birdcage flash hider for effective muzzle control.
The upper receiver is constructed from 7075 T6 aluminum, with an anodized finish for added strength. The Freefloat M-Lok handguard allows for easy attachment of accessories while promoting accuracy by minimizing pressure points on the barrel. This complete upper build kit is tailored for gunsmiths who prioritize performance and customization in their .338 ARC AR-15 projects.
Caliber: .338 ARC
Barrel Length: 16"
Barrel Material: 4150 CMV Steel
Barrel Finish: Parkerized
Barrel Profile: HBAR (Heavy Barrel)
Barrel Twist Rate: 1:8
Barrel Gas System Length: Carbine-Length
Barrel Thread Pitch: 5/8x24
Gas Block Size: 0.750"
Gas Block Name: Micro Low-Profile Gas Block
Muzzle Device: AR-15 5/8x24 TPI GI Birdcage Flash Hider
Upper Receiver Material: 7075 T6 Aluminum
Upper Receiver Finish: Anodized
Handguard Material: Not specified
Handguard Color: Black
Handguard Style: M-Lok
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