.458 SOCOM 10.5" Tanker AR-15 Upper – Color Series

.458 SOCOM Upper: Specs & Features

The Moriarti .458 SOCOM 10.5" Tanker Upper combines big-bore AR-15 performance with distinctive styling and customizable handguard finishes. Featuring a 10.5-inch 4150V nitride barrel, Tanker-style muzzle brake, and 10-inch diamond-cut M-LOK handguard, this upper assembly delivers a bold, compact configuration.

The black anodized upper receiver pairs with five available handguard colors: Black, Grey, Cobalt Blue, Burnt Bronze, and FDE. Each configuration maintains the same barrel, receiver, and muzzle device specifications while offering a different visual finish.

Key Features

• Caliber: .458 SOCOM

• Barrel: 10.5-inch 4150V steel with nitride finish

• Twist Rate: 1:14 RH

• Gas System: Carbine length

• Gas Block Diameter: .875 inch

• Handguard: 10-inch diamond-cut free-float M-LOK

• Handguard Colors: Black, Grey, Cobalt Blue, Burnt Bronze, FDE

• Upper Receiver: 7075-T6 aluminum with black anodized finish

• Muzzle Device: Tanker-style muzzle brake

• Bolt Carrier Group: Optional

• Charging Handle: Optional

Specifications

Package Includes

• Assembled .458 SOCOM upper receiver

• 10.5-inch 4150V nitride barrel

• Carbine-length gas system

• 10-inch diamond-cut M-LOK handguard in selected color

• Tanker-style muzzle brake

Bolt carrier group and charging handle are optional and not included unless selected.

Lower receiver not included.

FAQ

Are all five color options available with the same upper receiver configuration?

Yes. Every Tanker Color Series configuration features the same black anodized upper receiver, 10.5-inch barrel, and Tanker-style muzzle brake. Only the diamond-cut M-LOK handguard finish changes between Black, Grey, Cobalt Blue, Burnt Bronze, and FDE.

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 a standard mil-spec AR-15 lower receiver.

What bolt and magazines do I need?

A dedicated .458 SOCOM bolt carrier group. It feeds from standard AR-15 magazines in a single stack, so capacity is lower than with 5.56.

What twist rate does it use?

A 1:14 twist, the standard rate for .458 SOCOM bullets.

Related: .458 SOCOM uppers · all AR-15 upper assemblies