This upper build kit combines a 10.5 inch 6.5 Grendel barrel, 10 inch M-Lok freefloat handguard, and pistol gas system in a compact configuration. The upper receiver is forged 7075-T6 aluminum with anodized finish and M4 feed ramps. The barrel is Bear Creek 4150 CrMoV steel with phosphate finish and 1 in 8 twist rate. The handguard is 6061-T6 aluminum with M-Lok slots for accessory compatibility.
The 10.5 inch barrel length provides a balance of velocity retention and overall system length in 6.5 Grendel. The pistol gas system is matched to this barrel length for reliable cycling. The phosphate finish offers corrosion resistance and surface hardness.
The 10 inch handguard uses M-Lok attachment points along its length for modular accessory placement. The freefloat design isolates the barrel from handguard contact. The 6061-T6 aluminum construction maintains a lightweight profile while providing structural integrity.
The 7075-T6 forged aluminum upper receiver features an anodized finish for corrosion resistance. The M4 feed ramps provide enhanced feeding reliability. The upper is compatible with mil-spec AR-15 lower receivers and standard fire control groups.
The micro low profile gas block sits under the handguard for a clean profile. The stainless pistol length gas tube connects the gas block to the upper receiver. The pistol gas system provides reliable cycling for the 10.5 inch barrel length.
BCG and charging handle are not included. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.
Barrel: Bear Creek 10.5-inch 6.5 Grendel AR-15 Barrel, Pistol Gas, HBar, 1:8T, Parkerized 4150 CrMoV, 0.750, 5/8x24
Caliber: 6.5 Grendel
Barrel Length: 10.5-inch
Barrel Material: 4150 CrMoV
Barrel Gas System Length: Pistol
Barrel Profile: HBAR
Barrel Twist Rate: 1:8
Barrel Thread Pitch: 5/8x24
Barrel Finish: Phosphate
Gas Block Size: 0.750
Muzzle Device: 5/8"x24 TPI GI Birdcage Flash Hider
Muzzle Device Finish: Manganese Phosphate
Handguard: AR-15 Ultra-lightweight Minimalist Rail Partial Top Rail 10" Handguard No Anti-Rotation Tabs
Handguard Material: 6061-T6 Aluminum
Handguard Color: Black
Handguard Style: Free Float, M-LOK
Handguard Length: 10-inch
Gas Block: Micro Low-Profile Gas Block
Gas Block Material: Steel
Gas Block Finish: Phosphate
Gas Block Profile: Low-Profile
Gas Tube: Stainless Pistol-Length Gas Tube
Upper Receiver: AR-15 Upper Receiver, M4 Feed Ramps
Upper Receiver Material: 7075-T6 Aluminum
Upper Receiver Finish: Anodized
To view the most up-to-date shipping times Click HERE. To view Warranty, Returns, Terms & Restrictions Click HERE. To view State Restrictions Click HERE.