AR-15 5.56/.223 24" Spiral Stainless Steel Fluted Upper Assembly, M-LOK, Triport Muzzle Brake

24" 5.56 Upper: Specs & Features

Enhance your AR-15 build with the 24" Spiral Stainless Steel Fluted Upper Assembly, engineered for performance and accuracy. The 416 stainless steel heavy barrel features a spiral fluted design** reducing weight while maintaining strength. The barrel is hardened to 26-32 RC and stress relieved for durability and precision. Chambered in 5.56 NATO (also accepts .223), it features a 1-8 RH twist and 6-groove button rifling for superior accuracy. The barrel has a .750 diameter under the gas block, and a M4 feed ramp ensures reliable cycling.

The upper assembly is paired with Moriarti AR-15 upper receiver, crafted from 7075-T6 aluminum forgings and black hardcoat anodized to military specifications. A dust cover is installed for protection against debris.

The gas system includes a .750 steel gas block and rifle-length gas tube, providing consistent cycling. The 1/2x28 threaded Triport muzzle brake in nitride finish mitigates recoil, helping to maintain muzzle control during rapid fire.

This assembly features a 15" free-floating M-LOK rail that allows for easy attachment of accessories and ensures a slim, lightweight profile. The rail is made from aircraft-quality aluminum and anodized for added durability.

Key Features:

• Barrel: 24" 416 stainless steel spiral fluted heavy barrel, 1-8 RH twist, 6-groove button rifling.
• Chamber: 5.56 NATO (also accepts .223).
• Muzzle: 1/2x28 threaded Triport muzzle brake with nitride finish.
• Upper Receiver: A3 flat top 7075-T6 aluminum, black hardcoat anodized, dust cover installed, M4 feedramps.
• Gas System: .750 steel gas block, rifle-length gas tube, hardcoat anodized.
• Handguard: 15" free-floating M-LOK rail, made from aircraft-quality aluminum, black hardcoat anodized.
• No BCG/Charging Handle: Sold separately.

Compliance: CA, NY, and NJ compliant.

Please note: Images may not exactly represent the product as variations in M-LOK may occur depending on stock availability. Rest assured, the product quality remains excellent. 

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.

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

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