This complete upper features a 10.5-inch Bear Creek 4150 CrMoV barrel with a 10-inch M-Lok freefloat handguard, chambered in .338 ARC. The upper includes an anodized 7075-T6 aluminum receiver with M4 feed ramps, micro low-profile gas block, pistol-length gas system, GI birdcage flash hider, mil-spec charging handle, and 6.5 Grendel II QPQ nitride bolt carrier group with 9310 alloy steel construction.
.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 6.5 Grendel II bolt carrier group features QPQ nitride finish over 9310 alloy steel. The nitride treatment provides corrosion resistance and surface hardness while reducing friction. This BCG is designed for compatibility with .338 ARC chambering.
The 10-inch M-Lok freefloat handguard features 6061-T6 aluminum construction with M-Lok slots for modular accessory attachment and an integrated quad rail section for direct Picatinny mounting. The freefloat design isolates the barrel from external pressure, supporting accuracy in compact upper configurations.
This complete upper is compatible with standard AR-15 lower receivers. All components use mil-spec dimensions and threading, including the 5/8x24 TPI muzzle threads matching the included GI birdcage flash hider.
Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.
Platform: AR-15
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 Profile: HBAR
Barrel Twist Rate: 1:8
Barrel Gas System Length: Pistol
Barrel Thread Pitch: 5/8x24
Barrel Finish: Phosphate
Handguard Name: 10" MLOK Freefloat Handguard with Quad Rail on Front End
Handguard Material: 6061-T6 Aluminum
Handguard Color: Black
Handguard Style: M-Lok
Upper Receiver Name: AR-15 Upper Receiver with M4 Feedramps
Upper Receiver Material: 7075 T6 Aluminum
Upper Receiver Finish: Anodized
Gas Block Name: Micro Low-Profile Gas Block for .750 O.D Barrel Steel
Gas Block Size: 0.750
Bolt Carrier Name: AR-15 6.5 Grendel II QPQ Nitride Complete Bolt Carrier Group
Bolt Carrier Material: 9310 Alloy Steel
Bolt Carrier Finish: Nitride
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