18" 6MM ARC Upper - Ballistic Adv SPR Premium Black Series Barrel - 15" Rail - Comp Brake

18" 6MM ARC Upper Assembly for AR15 with 18" 6MM ARC Ballistic Adv SPR Premium Black Series Barrel, 15" Rail and Competition Muzzle Brake.

The 6mm ARC utilizes efficient, high-BC bullets to deliver unprecedented performance from the AR-15 platform, and is also used by specialized military groups for their multipurpose combat rifles. The 6mm ARC uses 6.5 Grendel BCGs and magazines.

Specifications:

• Barrel: 18 inch 6MM ARC SPR QPQ 416R Premium Black Series Barrel by Ballistic Advantage with 1x7 Twist, M4 Feed Ramps, and 5/8x24 Threads. All Ballistic Advantage barrels are guaranteed to give sub-MOA accuracy with match-grade ammunition.
• Upper: Mil-Spec Upper Receiver machined from 7075 T6 aluminum forging with forward assist and dust cover installed. Hard coat anodized MIL-STD 8625 Type 3 Class 2.
• Rail: 15" Narrow Profile Free Float Rail machined from 6061 T6 aluminum. Comfortable and light weight, with M-LOK or KEYMOD attachment points along the entire length at 3, 6, and 9 positions. Hard coat anodized MIL-STD 8625 Type 3 Class 2.
• Gas System: Rifle Length Gas System with 0.750" Low Profile Gas Block.
• Muzzle Device: Competition Muzzle Brake with crush washer.