The Ronin 18-inch Rifle-Gas 1:7.5 6MM ARC AR-15 Freefloat M-Lok Handguard Rifle Complete Upper Build from Davidson Defense is engineered for precision and reliability. Chambered in 6mm ARC, this upper features an 18-inch Government-profile barrel made from 4150 CrMoV steel, with a nitride finish for durability. The barrel's 1:7.5 twist rate and 5/8x24 thread pitch optimize performance for a variety of projectile weights. The upper receiver is constructed from 6061-T6 billet aluminum, finished in a Type III hard coat anodized treatment, ensuring both strength and low weight.
Paired with a sleek M-Lok handguard, also in 6061-T6 aluminum, this build offers modular accessory mounting options. A micro low-profile gas block facilitates reliable operation with a rifle-length gas system, while the included flash hider minimizes muzzle signature. Complemented by a mil-spec AR-15 charging handle and an 8620 alloy steel bolt carrier, this upper assembly is ready for the most discerning gunsmiths who value freedom in their firearms.
Caliber: 6mm ARC
Barrel Material: 4150 CrMoV
Barrel Length: 18-inch
Barrel Finish: Nitride
Barrel Profile: Government
Barrel Twist Rate: 1:7.5
Barrel Thread Pitch: 5/8x24
Barrel Gas System Length: Rifle
Upper Receiver Material: 6061-T6 Billet Aluminum
Upper Receiver Finish: Type III Hard Coat Anodized
Upper Receiver Name: Black Diamond Series AR-15 Billet Upper Receiver
Handguard Material: 6061-T6 Aluminum
Handguard Color: Black
Handguard Style: M-Lok
Gas Block Size: 0.750 O.D
Gas Block Name: Micro Low-Profile Gas Block
Muzzle Device: Flash Hider
Muzzle Thread Pitch: 5/8x24
Charging Handle: AR-15 M4 Charging Handle Mil-Spec Quality
Bolt Carrier Material: 8620 Alloy Steel
Bolt Carrier Finish: Nitride
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