Moriarti MA-15 6mm ARC 18" Precision Rifle – 15" M-LOK, Luth-AR MBA-3

6mm ARC Rifle: Specs & Features

The Moriarti MA-15 6mm ARC 18" Precision Rifle is a semi-automatic AR-15 platform rifle featuring an 18-inch 4150 CMV barrel with a black nitride finish, a 15-inch free-floating M-LOK handguard, and a Luth-AR MBA-3 adjustable carbine stock.

Chambered in 6mm ARC, the rifle features a 1:8 barrel twist, 5/8×24 muzzle threads, and an A2 flash hider. Its carbine-length gas system incorporates a stainless steel gas tube and a .750 low-profile steel gas block.

The forged 7075-T6 flat-top upper receiver features M4 feed ramps and is paired with a forged Moriarti lower receiver incorporating a tension adjustment screw. The rifle includes an M16-profile nitride-coated bolt carrier group, a mil-spec charging handle, and mil-spec AR-15 lower components.

The Luth-AR MBA-3 stock provides an adjustable cheek rest, length-of-pull adjustment, and a multi-axis adjustable buttplate. Its glass-filled nylon construction combines a rigid stock design with adjustable fit characteristics.

Key Features

• 6mm ARC chambering

• 18" 4150 CMV black nitride finish

• 1:8 barrel twist

• 5/8×24 muzzle threads

• A2 flash hider

• Carbine-length gas system

• .750 low-profile steel gas block

• Stainless steel carbine-length gas tube

• 15" slim-profile free-floating M-LOK handguard

• Forged 7075-T6 upper receiver with M4 feed ramps

• Forged Moriarti lower receiver with tension adjustment screw

• M16-profile nitride bolt carrier group

• Luth-AR MBA-3 adjustable carbine stock

Specifications

Package Includes

• Complete Moriarti MA-15 6mm ARC 18" rifle

• Installed 15" free-floating M-LOK handguard

• Installed A2 flash hider

• Installed Luth-AR MBA-3 adjustable stock

• Bolt carrier group and charging handle

FAQ

What barrel does the Moriarti 18" 6mm ARC rifle use?

An 18-inch 4150 CMV barrel with a black nitride finish, 1:8 twist rate, and 5/8×24 muzzle threads.

What stock is installed?

The Luth-AR MBA-3 adjustable carbine stock, featuring adjustable cheek-rest height, length of pull, and buttplate positioning.

What handguard does the rifle feature?

A 15-inch slim-profile free-floating M-LOK handguard.

What magazines are compatible?

Compatible 6mm ARC / 6.5 Grendel-pattern AR-15 magazines.

Does the rifle require an FFL transfer?

Yes. This complete firearm must be transferred through a licensed Federal Firearms License dealer in accordance with applicable laws.

Product Image Notice

Images may not be an exact representation of the product.

FFL Transfer Notice

This rifle must ship to a licensed Federal Firearms License dealer. Please have your receiving FFL provide a signed copy referencing your order.

Explore our complete AR firearms for additional configurations.