Moriarti AR-15 .338 ARC 16" Upper Assembly with 12" M-LOK and A2 Flash Hider

Moriarti AR-15 .338 ARC 16" Upper Assembly | 12" M-LOK | A2 Flash Hider

Step up your AR game with the Moriarti AR-15 .338 ARC 16" Upper Assembly, built for enhanced energy delivery, accuracy, and control. This upper is engineered to maximize the ballistic potential of the .338 Advanced Rifle Cartridge (ARC), delivering optimal performance for both hunting and long-range shooting.

With a durable 16” medium-profile barrel, a pistol-length gas system for smooth cycling, and a 12” M-LOK free-float rail for complete accessory modularity, this build is a precision powerhouse.

Key Features:

Barrel

• Length: 16"

• Chamber: .338 ARC

• Profile: Medium

• Twist Rate: 1:8 – ideal for stabilizing a wide range of bullet weights

• Thread: 5/8x24

• Muzzle Device: A2 Flash Hider – reduces flash signature and improves muzzle control

• Material: 4150 Chrome Moly Vanadium (4150V)

• Finish: Black Nitride

• Weight: 30 oz

Gas System

• Type: Pistol-Length

• Gas Block: .750” low profile steel

Upper Receiver

• A3 Flat Top forged from 7075-T6 aluminum

• Hardcoat anodized, mil-spec

• Includes forward assist and dust cover

Handguard

• 12” Moriarti Slim M-LOK Free Float Rail

• Aircraft-grade aluminum construction

• Full M-LOK compatibility at 3, 6, 9 o'clock positions

• Ergonomic and ventilated for better grip and cooling

Ballistic Performance Estimate (Supersonic Loads)

Suggested Pairings

• Looking for a custom finish? Explore Moriarti Builder Sets

  
  

Proudly made in the USA by Moriarti Armaments

Does not come with BCG and Charging Handle. Images may not be an exact representation of the product.