The Ronin Competition 18-inch Rifle-Gas 1:7.5 6MM ARC AR-15 Freefloat M-Lok Handguard Rifle Upper Build Kit from Davidson Defense offers precision and reliability for the discerning gunsmith. Featuring an 18-inch barrel made from 4150 CrMoV steel, it boasts a nitride finish for durability and corrosion resistance. The barrel's government profile and 1:7.5 twist rate optimize performance for 6mm ARC ammunition, while the rifle-length gas system ensures smooth cycling.
The upper receiver is crafted from 6061-T6 billet aluminum, anodized for added strength and resilience. A 0.750" gas block works in harmony with the included AR-15 TPI GI Birdcage flash hider, which features a 5/8x24 muzzle thread pitch. The free-floating M-Lok handguard, built from 6061-T6 aluminum, allows for versatile accessory attachment, making this upper build kit a solid choice for building a reliable AR-15 platform.
Barrel Length: 18-inch
Caliber: 6mm ARC
Barrel Material: 4150 CrMoV
Barrel Thread Pitch: 5/8x24
Barrel Color: Black
Barrel Finish: Nitride
Barrel Profile: Government
Barrel Twist Rate: 1:7.5
Barrel Gas System Length: Rifle
Gas Block Size: 0.750"
Muzzle Device: AR-15 TPI GI Birdcage Flash Hider
Muzzle Thread Pitch: 5/8x24
Upper Receiver Name: Mil-Spec AR-15 Upper with M4 Feedramps
Upper Receiver Material: 6061-T6 Billet Aluminum
Upper Receiver Finish: Anodized
Handguard Material: 6061-T6 Aluminum
Handguard Color: Black
Handguard Style: M-Lok
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