Moriarti AR-15 5.56/.223 17.1" Pentagon Stainless Upper Assembly, M-LOK, Predator

17.1" 5.56 Upper: Specs & Features

Transform your AR-15 build with the AR-15 5.56/.223 Pentagon Stainless Upper Assembly. Engineered for exceptional performance, this custom upper features a precision-crafted 17.1" 223 Wylde barrel, Pentagon fluting, and an included Predator flash hider. Designed to shoot both 5.56 NATO and .223 Remington rounds, this upper assembly offers versatility and reliability for a wide range of applications, from tactical shooting to long-range precision.

Custom-Made for Optimal Precision: The 17.1" barrel is crafted from 416R stainless steel, known for its superior corrosion resistance and strength. The Pentagon-style fluting reduces barrel weight while enhancing rigidity for better accuracy and quicker follow-up shots. The Predator flash hider minimizes muzzle flash, allowing for stealthy shooting in low-light conditions.

Performance-Enhancing Features:

• .223 Wylde Chamber: Allows for the safe use of both 5.56 NATO and .223 Rem ammunition, making this upper incredibly versatile for various shooting needs.
• Low Profile Gas Block & Mid Length Gas System: The low profile gas block and mid-length gas system offer smooth cycling and less recoil, improving your shooting experience.
• MLOK Handguard: The 12" MLOK free float rail provides a slim profile and a solid mounting platform for accessories, offering easy customization for your optics, grips, or lights.

Reliable Construction:

• A3 Flat-Top Upper Receiver: Constructed from 7075-T6 aluminum, this upper receiver is built to military specifications and features M4 feedramps for flawless feeding and function.
• Steel Gas Block: The .750 low profile gas block ensures durability and consistent cycling for optimal reliability.
• Aircraft-Quality Handguard: The 12" MLOK rail is crafted from high-quality aluminum and anodized for a rugged, corrosion-resistant finish that stands up to heavy use.

Specifications:

• Barrel: 17.1" 416R stainless steel HBAR, Pentagon flutes, nitride-coated, 1-8 RH twist, .750 under gas block, threaded 1/2x28.
• Muzzle Device: Predator flash hider.
• Gas System: .750 low profile gas block, mid-length stainless steel gas tube.
• Handguards: 12" MLOK free-floating rail, aircraft-quality aluminum, black hardcoat anodized.
• Upper Receiver: A3 flat-top, 7075-T6 aluminum, black hardcoat anodized to Gov. specs., with forward assist and dust cover.

Important Notes:

• This upper assembly does not include BCG or Charging Handle, but they are available for purchase separately.
• Rails may differ in design based on stock availability but will always meet the same high-quality standards.
• Images may not be an exact representation of the product.

FAQ

Will this upper fit my AR-15 lower?

Yes. It fits any standard mil-spec AR-15 lower receiver and uses a standard 5.56 bolt carrier group and STANAG/AR-15 magazines.

What is a .223 Wylde chamber?

A hybrid chamber that safely fires both 5.56 NATO and .223 Remington while giving the tighter accuracy of a .223-style throat.

Is a bolt carrier group included?

No. The bolt carrier group is sold separately; any standard 5.56 AR-15 BCG will work.

What twist rate does it use?

A 1:8 twist, a versatile rate for 55 gr to 77 gr bullets.

Related: 5.56 NATO & .223 Wylde AR-15 uppers