Moriarti AR-15 6.8 SPC II 12.5" Upper Assembly – 10" M-LOK, Thread Protector

6.8 SPC Upper: Specs & Features

The Moriarti AR-15 6.8 SPC II 12.5" Upper Assembly combines a compact medium-profile barrel with a durable forged upper receiver and a lightweight free-floating M-LOK handguard.

Chambered in 6.8 SPC Type II, this upper features a 12.5-inch 4150 Chrome Moly Vanadium barrel with a black nitride finish and 1:10 twist rate. The carbine-length gas system incorporates a matching gas tube and .750-inch low-profile steel gas block.

The barrel features 5/8×24 muzzle threads with an installed thread protector, providing a clean muzzle configuration and compatibility with appropriately matched muzzle accessories.

The assembly includes a forged 7075-T6 aluminum A3 flat-top upper receiver with a black MIL-SPEC hardcoat anodized finish, forward assist, and dust cover.

A 10-inch Super Slim free-floating M-LOK handguard offers a lightweight, ergonomic design with mounting slots at the 3, 6, and 9 o'clock positions.

The upper is available with an optional 6.8 SPC / .224 Valkyrie-compatible bolt carrier group and AR-15 charging handle.

Key Features

• 12.5" 4150 CrMoV medium-profile barrel

• 6.8 SPC Type II chamber

• 1:10 twist rate

• Black nitride barrel finish

• Carbine-length gas system

• Carbine-length gas tube

• .750" low-profile steel gas block

• 5/8×24 threaded muzzle

• Installed thread protector

• Forged 7075-T6 A3 flat-top upper receiver

• Black MIL-SPEC hardcoat anodized finish

• Installed forward assist and dust cover

• 10" Super Slim free-floating M-LOK handguard

• Aircraft-grade aluminum handguard construction

• M-LOK slots at 3, 6, and 9 o'clock

• Optional 6.8 SPC / .224 Valkyrie-compatible BCG

• Optional charging handle

Specifications

Package Includes

• Assembled Moriarti AR-15 6.8 SPC II 12.5" upper receiver

• Installed 12.5" 4150 CrMoV black nitride barrel

• Installed .750" low-profile steel gas block

• Installed carbine-length gas tube

• Installed 5/8×24 thread protector

• Forged 7075-T6 A3 upper receiver with forward assist and dust cover

• 10" Super Slim free-floating M-LOK handguard

BCG and charging handle are not included unless selected as optional upgrades.

FAQ

What chamber does this upper use?

The barrel is chambered in 6.8 SPC Type II.

What bolt carrier group is required?

A compatible 6.8 SPC / .224 Valkyrie bolt is required. Select the appropriate BCG option when ordering.

What gas system does this upper feature?

The upper uses a carbine-length gas system with a matching carbine-length gas tube and .750-inch low-profile steel gas block.

Is a muzzle device included?

The 5/8×24 threaded barrel comes equipped with a thread protector. No flash hider or muzzle brake is included.

What handguard is installed?

A 10-inch Super Slim free-floating M-LOK handguard manufactured from aircraft-grade aluminum.

Does this upper include a charging handle?

The charging handle is available as an optional upgrade.

Will this upper fit a standard AR-15 lower receiver?

It is designed for compatible AR-15-pattern lower receivers. Use compatible 6.8 SPC magazines and components.

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