Moriarti AR-15 16" Stainless Straight Fluted Upper – 5.56/.223 Tactical Build with 12" MLOK

5.56 NATO &.223 Wylde

AR-15 16" 5.56/.223 Straight Fluted Stainless Tactical Upper / 12" MLOK / Carbine | Moriarti Arms

The AR-15 5.56/.223 16" Stainless Steel Straight Fluted Tactical Upper from Moriarti Arms delivers uncompromised performance with a clean, aggressive design. Built to exacting standards using premium materials, this upper is perfect for shooters who demand durability and accuracy in a modern tactical build.

At its core is a 16" 416R stainless steel HBAR barrel, straight fluted for enhanced rigidity, cooling, and aesthetic appeal. The barrel is stress relieved, hardened to 26-32 RC, and features a 1:8 right-hand twist—ideal for stabilizing a broad range of 55- to 69-grain projectiles. Chambered in 5.56 NATO, it also safely fires .223 Remington. M4 feedramps are milled into the barrel extension for smooth and reliable cycling.

The muzzle is threaded 1/2x28 and finished with a recoil-reducing muzzle brake and crush washer, making it range-ready out of the box.

The A3 upper receiver is crafted from 7075-T6 aerospace-grade aluminum, then black hardcoat anodized to government specifications for maximum corrosion resistance. It comes complete with forward assist, dust cover, and M4 feedramps.

The 12" free-floating MLOK handguard gives you the modularity to mount modern accessories while maintaining a clean profile. Manufactured from aircraft-grade aluminum, it’s built to withstand abuse without adding unnecessary weight.

The upper runs a carbine-length gas system with a .750 low-profile steel gas block, offering smooth cycling and long-term durability.

Bolt carrier group and charging handle not included — available separately.
All Moriarti uppers are assembled in the USA with hand-matched components and test-fired for quality assurance.

Key Features:

• Caliber: 5.56 NATO / .223 Remington

• Barrel: 16" 416R Stainless, HBAR Profile, Straight Fluted

• Twist Rate: 1:8, Button Rifled

• Muzzle Device: Muzzle Brake, 1/2x28 Thread, Crush Washer Included

• Upper Receiver: A3 Flat Top, 7075-T6 Forged Aluminum, Black Hardcoat Anodized

• Handguard: 12" Free-Floating MLOK, Aircraft-Grade Aluminum

• Gas System: Carbine Length, Stainless Gas Tube, .750 Low-Profile Steel Gas Block

• Feedramps: M4 Cut

• Finish: Stainless Barrel / Black Receiver and Rail

• Compatibility: Mil-Spec AR-15 Lowers

• BCG/Charging Handle: Not Included

Pair it with a Moriarti Arms AR-15 Lower for a complete upgrade.