Davidson Defense Warden Competition 18-inch Rifle-Gas 1:7.5 6MM ARC AR-15 Freefloat Keymod Handguard Rifle Complete Upper Build

Warden Competition 18 Inch Rifle Gas 1:7.5 6MM ARC AR-15 Freefloat Keymod Handguard Upper

This Davidson Defense Warden Competition AR-15 upper delivers precision shooting capability through an 18 inch 6MM ARC barrel in 4150 CrMoV steel with nitride finish, 1:7.5 twist rate, and rifle length gas system. The upper includes 15 inch freefloat Keymod handguard, micro low profile gas block, QPQ nitride 6.5 Grendel II bolt carrier group, M4 Mil-Spec charging handle, and 7075 T6 aluminum anodized upper receiver with M4 feed ramps. Built with 5/8x24 GI birdcage flash hider and government profile barrel featuring 5R rifling, this upper provides all necessary components for AR-15 lower receivers chambered in 6MM ARC requiring rifle gas system function and 18 inch barrel accuracy potential for competitive and precision shooting applications.

Key Features

• 18 inch government profile barrel in 4150 CrMoV steel with nitride finish, 1:7.5 twist rate, and 5R rifling
• Rifle length gas system with micro low profile gas block at .750 diameter for smooth cycling
• 15 inch freefloat Keymod handguard in 7075 aluminum with black finish for accessory mounting
• QPQ nitride 6.5 Grendel II bolt carrier group with 8620 alloy steel body and 9310 alloy steel bolt head
• AR-15 M4 Mil-Spec charging handle and 7075 T6 aluminum anodized upper receiver with M4 feed ramps
• 5/8x24 GI birdcage flash hider reduces flash signature and protects 5/8x24 muzzle threads
• Includes bolt carrier group and charging handle

Perfect For

• Precision shooters seeking 6MM ARC platform performance with 18 inch barrel and rifle gas system
• Competitive shooters prioritizing accuracy potential through 5R rifling and 1:7.5 twist rate
• Long range enthusiasts requiring upper with all necessary components for 6MM ARC
• Budget conscious builders wanting freefloat Keymod handguard without additional component purchases

18 Inch 6MM ARC Barrel with Rifle Gas System

The 18 inch barrel is manufactured from 4150 Chrome Moly Vanadium steel with nitride finish for corrosion resistance and surface hardness. The 1:7.5 twist rate stabilizes 6MM ARC projectiles across the common weight range, supporting accuracy with match grade ammunition. Government profile balances weight distribution and barrel stiffness for precision shooting applications. 5R rifling reduces bullet deformation and fouling compared to traditional rifling, potentially improving accuracy and extending cleaning intervals. Rifle length gas system provides smooth cycling characteristics with reduced felt recoil, making this configuration well suited for precision shooting and long range applications. The .750 gas block journal accepts the included micro low profile gas block that sits beneath the handguard. 5/8x24 thread pitch accommodates common muzzle devices for 6MM ARC including suppressors, brakes, and compensators.

Freefloat Keymod Handguard and Upper Receiver

The 15 inch freefloat Keymod handguard is constructed from 7075 aluminum with black finish, providing a lightweight platform that eliminates contact with the barrel. This freefloat design supports accuracy potential by preventing handguard pressure from affecting barrel harmonics. Keymod attachment points allow mounting of accessories including lights, grips, and bipods without additional rail sections. The 7075 T6 aluminum upper receiver features M4 feed ramps for reliable feeding and anodized finish for corrosion protection. The micro low profile gas block sits beneath the handguard for a clean appearance and reduced snag points.

6.5 Grendel II Bolt Carrier Group and Components

The QPQ nitride 6.5 Grendel II bolt carrier group features 8620 alloy steel carrier body and 9310 alloy steel bolt head with nitride finish for enhanced lubricity and corrosion resistance. The 6.5 Grendel II bolt face dimensions are compatible with 6MM ARC cartridges, providing proper case support and extraction. QPQ nitride treatment creates a hard surface that resists wear during extended firing schedules. The AR-15 M4 Mil-Spec charging handle provides reliable manipulation for charging and clearing operations. The bolt carrier group includes bolt, carrier, gas key, cam pin, and firing pin. The 5/8x24 GI birdcage flash hider reduces muzzle flash signature and protects the muzzle threads when suppressors or other devices are not installed.

Follow safe handling and manufacturer instructions. Ensure compatibility with your specific AR-15 lower receiver. Verify headspace and function after installation. Ensure compliance with all applicable laws.