8.5" 338 ARC Complete Upper Assembly for AR15 with 8.5" 338 ARC Shaw Heavy Matte SS Barrel, 7" Rail and A2 Flash Hider. Includes BCG & Charging Handle.

Engineered for consistent pressure, the 338 ARC provides consistent and reliable cycling with both super and subsonic loads. Purposefully designed for hard‑hitting subsonic performance, the 338 ARC delivers substantially more energy than the 300 Blackout Subsonic or Supersonic. This may be the best round yet to run suppressed.

Specifications:

• Barrel: 8.5 inch 338 ARC Heavy 416R Matte SS Barrel by Shaw Barrels with 1x8 Twist, 30 Cal Feed Ramps, and 5/8x24 Threads. Shaw Custom Barrels offer unparalleled quality, reliability, and accuracy - every one we sell is match grade.
• 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: 7" 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: Pistol Length Gas System with 0.750" Low Profile Gas Block.
• Muzzle Device: A2 Flash Hider with crush washer.
• Bolt Carrier Group: 338 ARC Nitride BCG with a 8620 Steel Carrier, 9310 Steel Bolt, and MIM Steel Extractor. Mag Particle Inspected and Pressure Tested.
• Charging Handle: Mil-Spec AR15 Charging Handle