The Steel Alchemist 18-inch AR-15 6MM ARC Rifle Complete Upper Build from Davidson Defense is engineered for durability and precision, making it suited for accurate shooting in various conditions. This upper build features an 18-inch barrel made from 4150 CrMoV steel, nitride finished for enhanced longevity, with a medium profile and a 1:7 twist rate. The mid-length gas system ensures reliable operation with a 0.750 gas block size. The upper receiver is crafted from 7075-T6 aluminum and anodized for a resilient finish, paired with a black M-Lok compatible handguard made from 6061-T6 aluminum. The assembly includes a Mil-Spec AR-15 M4 charging handle and a complete AR-15 6.5 Grendel II QPQ nitride bolt carrier group, providing robust performance. The muzzle is equipped with a GI Birdcage flash hider threaded at 5/8x24, reinforcing the functional and practical aspects of this complete upper build.
Caliber: 6mm ARC
Barrel Material: 4150 CrMoV
Barrel Thread Pitch: 5/8x24
Barrel Gas System Length: Mid-Length
Barrel Length: 18-inch
Barrel Finish: Nitride
Barrel Profile: Medium
Barrel Twist Rate: 1:7
Upper Receiver Material: 7075-T6 Aluminum
Upper Receiver Finish: Anodized
Handguard Material: 6061-T6 Aluminum
Handguard Color: Black
Handguard Style: M-Lok
Charging Handle: Mil-Spec AR-15 M4 Charging Handle
Bolt Carrier Material: 9310 Alloy Steel, 8620 Alloy Steel
Bolt Carrier Finish: Nitride
Bolt Carrier Name: AR-15 6.5 Grendel II QPQ Nitride Complete Bolt Carrier Group
Gas Block Size: 0.750
Gas Block Name: Recoil Technologies Micro Low-Profile Gas Block
Muzzle Device: AR-15/AR-10 .308 5/8x24 TPI GI Birdcage Flash Hider
Muzzle Thread Pitch: 5/8x24
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