This upper build kit combines a 10.5 inch 6.5 Grendel barrel, 10 inch Trinity Force MX10 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 HBAR profile and 1 in 8 twist rate. The handguard features M-Lok slots for accessory compatibility.
The 10.5 inch HBAR profile barrel is chambered in 6.5 Grendel with a 1 in 8 twist rate for projectile stabilization. The pistol gas system is matched to this barrel length for reliable cycling. The barrel features 5/8x24 threads with an included GI birdcage flash hider.
The 10 inch Trinity Force MX10 handguard uses M-Lok attachment points along its length for modular accessory placement. The freefloat design isolates the barrel from handguard contact. The handguard provides a stable platform for optics and accessories.
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 pistol gas system provides reliable cycling for the 10.5 inch barrel length. The gas system is configured for consistent operation with 6.5 Grendel ammunition.
BCG and charging handle are not included. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.
Platform: AR-15
Caliber: 6.5 Grendel
Barrel: Bear Creek 10.5-inch 6.5 Grendel AR-15 Barrel
Barrel Length: 10.5-inch
Barrel Material: 4150 CrMoV
Barrel Twist Rate: 1:8
Barrel Profile: HBAR
Barrel Gas System Length: Pistol
Barrel Thread Pitch: 5/8x24
Barrel Finish: Phosphate
Handguard: Trinity Force MX10 M-Lok
Handguard Length: 10 inches
Handguard Style: Free Float M-LOK
Handguard Color: Black
Muzzle Device: AR-15/AR-10 .308 5/8x24 TPI GI Birdcage Flash Hider
Muzzle Thread Pitch: 5/8x24
Gas Block: Micro Low-Profile Gas Block
Gas Block Size: 0.750
Gas Block Material: Steel
Upper Receiver: AR-15 Upper Receiver, M4 Feed Ramps
Upper Receiver Material: 7075 T6 Aluminum
Upper Receiver Finish: Anodized
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