This full build kit combines a 10.5-inch Bear Creek 4150 CrMoV barrel with a 10-inch M-Lok freefloat handguard, chambered in .338 ARC. The kit includes an anodized 7075-T6 aluminum upper receiver with M4 feed ramps, micro low-profile gas block, pistol-length gas system, GI birdcage flash hider, mil-spec charging handle, 6.5 Grendel II QPQ nitride bolt carrier group, SB Tactical SBA3 adjustable pistol stabilizing brace, mil-spec heavy-duty 6-position buffer tube, 3 oz buffer, carbine recoil spring, castle nut, end plate, and lower parts kit. Lower receiver not included.
.338 ARC delivers substantial energy transfer and extended effective range in a compact platform. The caliber provides stopping power suitable for medium game applications while maintaining compatibility with AR-15 platform dimensions.
The SB Tactical SBA3 adjustable pistol stabilizing brace provides five positions of length adjustment. The brace pairs with the included mil-spec heavy-duty 6-position buffer tube, 3 oz buffer, carbine recoil spring, castle nut, and end plate.
The 6.5 Grendel II bolt carrier group features QPQ nitride finish over 8620 alloy steel. The nitride treatment provides corrosion resistance and surface hardness while reducing friction. This BCG is designed for compatibility with .338 ARC chambering.
This full build kit is compatible with mil-spec AR-15 lower receivers. All components use standard AR-15 specifications and threading, including the 5/8x24 TPI muzzle threads matching the included GI birdcage flash hider.
Lower receiver not included. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.
Barrel Name: Bear Creek 10.5-inch .338 ARC Pistol Length H-Bar
Caliber: .338 ARC
Barrel Length: 10.5-inch
Barrel Material: 4150 CrMoV
Barrel Thread Pitch: 5/8x24
Barrel Twist Rate: 1:8
Barrel Gas System Length: Pistol
Barrel Profile: HBAR
Barrel Finish: Phosphate
Handguard Name: 10" MLOK Freefloat Handguard with Quad Rail
Handguard Material: 6061-T6 Aluminum
Handguard Color: Black
Handguard Style: Freefloat with M-Lok
Upper Receiver Name: AR-15 Upper Receiver with M4 Feed Ramps
Upper Receiver Material: 7075 T6 Aluminum
Upper Receiver Finish: Anodized
Pistol Brace Name: SB Tactical SBA3 Adjustable Pistol Stabilizing Brace
Gas Block Name: Micro Low-Profile Gas Block
Gas Block Size: .750
Muzzle Device Name: AR-15/AR-10 .308 5/8x24 TPI GI Birdcage Flash Hider
Muzzle Thread Pitch: 5/8x24
Charging Handle Name: AR-15 Mil-Spec Charging Handle
Bolt Carrier Name: AR-15 6.5 Grendel II QPQ Nitride Complete Bolt Carrier Group
Bolt Carrier Material: 8620 Alloy Steel
Bolt Carrier Finish: Nitride
Buffer Tube Kit Name: Mil-Spec Heavy-Duty AR-15 6-Position Buffer Tube
Buffer Spring: AR-15 Carbine Recoil Spring
Buffer Weight: 3 oz
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