This full build kit provides all components needed to complete a 338 ARC AR-15 build except the lower receiver. It includes a 10.5 inch HBAR barrel with pistol gas system, M-Lok freefloat handguard, complete bolt carrier group with nitride finish, charging handle, buffer system, lower parts kit, and Gauntlet Arms stabilizing brace. The upper receiver is forged 7075-T6 aluminum with anodized finish and M4 feed ramps. The barrel is 4150 CrMoV steel with phosphate finish and 1 in 8 twist rate.
This kit includes the upper assembly, bolt carrier group, charging handle, buffer tube assembly with pistol buffer and spring, lower parts kit, and stabilizing brace. All components required to complete an AR-15 pistol build are provided except the lower receiver.
The Gauntlet Arms polymer stabilizing brace provides structural integrity for stabilization. The brace is paired with a complete buffer system including pistol buffer tube, buffer, recoil spring, and necessary hardware.
The 10.5 inch HBAR profile barrel is chambered in 338 ARC with a 1 in 8 twist rate for projectile stabilization. The phosphate finish offers corrosion resistance and surface hardness. The pistol gas system is matched to the barrel length for reliable cycling. The micro low profile gas block sits under the handguard for a clean profile. The upper receiver features M4 feed ramps for reliable feeding.
The 9310 alloy steel bolt carrier group features a nitride finish for enhanced corrosion resistance and reduced friction. The M-Lok freefloat handguard provides attachment slots for modular accessory placement with 6061-T6 aluminum construction.
Lower receiver not included. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.
Caliber: .338 ARC
Barrel Length: 10.5-inch
Barrel Material: 4150 CrMoV
Barrel Twist Rate: 1:8
Barrel Thread Pitch: 5/8x24
Barrel Gas System Length: Pistol
Barrel Profile: HBAR
Barrel Finish: Phosphate
Handguard Material: 6061-T6 Aluminum
Handguard Style: Free Float
Handguard Color: Black
Upper Receiver Material: 7075 T6 Aluminum
Upper Receiver Finish: Anodized
Upper Receiver: AR-15 Upper Receiver, M4 Feed ramps
Gas Block Size: 0.750
Gas Block: Micro Low-Profile Gas Block, .750 O.D Barrel Steel
Muzzle Device: AR-15/AR-10 .308 5/8x24 TPI GI Birdcage Flash Hider
Muzzle Thread Pitch: 5/8x24
Charging Handle: AR-15 Mil-Spec Charging Handle
Bolt Carrier Material: 9310 Alloy Steel
Bolt Carrier Finish: Nitride
Bolt Carrier: AR-15 6.5 Grendel II QPQ Nitride Complete Bolt Carrier Group
Pistol Brace: Polymer Stabilizing Brace - Black, Gauntlet Arms
Buffer Tube Material: Aluminum
Buffer Weight: 3 oz
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