5" 5.56 NATO AR-15 Pistol Upper Assembly – 1:5 5R Barrel, Custom Color Accents

5" 5.56 Upper: Specs & Features

The Moriarti 5" 5.56 NATO AR-15 Pistol Upper Assembly features a 4150 steel barrel with black nitride finish, 1:5 twist rate, and 5R rifling. Its micro-length gas system incorporates a .750" low-profile steel gas block and proprietary micro gas tube.

The assembly includes a forged 7075-T6 aluminum upper receiver with black hardcoat anodized finish and a 4" black C-cut M-LOK handguard.

Selectable Cerakote finishes apply to the charging handle, dust cover, forward assist, and A2-style muzzle device.

Specifications

Color selections

Burnt Bronze, FDE, OD Green, Robins Egg, Pink, Red, Gold, Hunter Orange, Bright White, Lemon Zest, and Zombie Green.

Package Includes

One assembled 5" upper with installed barrel, gas system, 4" M-LOK handguard, charging handle, dust cover, forward assist, and A2-style muzzle device in the selected accent finish.

Bolt carrier group and lower receiver are not included.

FAQ

Which components receive the selected color?

The charging handle, dust cover, forward assist, and A2-style muzzle device receive the selected finish. The upper receiver and handguard remain black.

Is a bolt carrier group included?

No. The BCG is sold separately.

Product Image Notice

Images may not be the exact representation of the product.

More Questions

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.

Can I shoot both 5.56 NATO and .223 Remington?

Yes. A 5.56 NATO or .223 Wylde chamber safely fires both 5.56 NATO and .223 Remington ammunition.

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 fast 1:5 twist, chosen to stabilize bullets from a very short barrel.

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