The Ronin 18-inch Rifle Gas 1:7.5 AR-15 6MM ARC Freefloat M-Lok Handguard Rifle Upper Build Kit from Davidson Defense is engineered for precision and reliability. The kit features an 18-inch barrel made of 4150 CrMoV steel with a government profile and a nitride finish, designed for longevity and performance. Its 1:7.5 twist rate ensures optimal stabilization of 6MM ARC ammunition.
The upper receiver is crafted from 6061-T6 billet aluminum and finished with a Type III hard coat anodization for durability. A rifle-length gas system works with a low-profile steel micro gas block, and the 5/8x24 muzzle thread pitch accommodates an AR-15 TPI GI birdcage flash hider. The included freefloat M-Lok handguard enhances versatility and modularity, constructed from 6061-T6 aluminum and finished in black. This upper build kit is ideal for gunsmiths seeking a robust foundation for a custom AR-15 build.
Caliber: 6MM ARC
Barrel Length: 18-inch
Barrel Material: 4150 CrMoV
Barrel Twist Rate: 1:7.5
Barrel Profile: Government
Barrel Finish: Nitride
Barrel Thread Pitch: 5/8x24
Barrel Gas System Length: Rifle
Gas Block: Steel Micro Low-Profile Gas Block
Gas Block Size: 0.750"
Muzzle Device: AR-15 TPI GI Birdcage Flash Hider
Muzzle Thread Pitch: 5/8x24
Handguard Material: 6061-T6 Aluminum
Finish: Type III Hard Coat Anodized
Handguard Color: Black
Handguard Style: Free-float, M-LOK compatible
Upper Receiver Material: 6061-T6 Billet Aluminum
Upper Receiver Finish: Type III Hard Coat Anodized
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