5.56 NATO & .223 Wylde
AR-15 5.56/.223 18" Stainless Steel Diamond Fluted Upper | 1:8 Twist | 15" M-LOK | Moriarti Arms
The AR-15 5.56/.223 18" Stainless Steel Diamond Fluted Upper Assembly is designed for marksmen who demand precision, durability, and style in a complete upper. Featuring an 18" 416R stainless steel HBAR barrel, this upper is chambered in .223 Wylde, giving you optimal performance with both 5.56 NATO and .223 Remington.
The diamond fluted barrel increases surface area for faster cooling while reducing weight, and is button-rifled with a 1:8 right-hand twist for excellent stabilization across a wide range of bullet weights.
Topped with a 15" slim M-LOK handguard, you’ll have ample space for attachments while maintaining a lightweight build. This upper also includes a stainless steel X-treme muzzle brake with 1/2x28 threads and a crush washer for reduced recoil and superior control.
Key Features:
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Caliber: .223 Wylde (compatible with 5.56 NATO and .223 Rem)
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Barrel: 18" 416R Stainless Steel, HBAR, Diamond Fluted
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Twist Rate: 1:8 RH, Button Rifled
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Feed Ramps: M4
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Gas System: Carbine Length Stainless Tube w/ .750 Low Profile Gas Block
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Muzzle Device: Stainless X-treme Muzzle Brake, 1/2x28 Threads
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Receiver: A3 Flat Top, 7075-T6 Aluminum, Black Hardcoat Anodized
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Handguard: 15" Free Float Slim M-LOK, Aircraft-Grade Aluminum, Anodized Black
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Compatibility: Fits any standard AR-15 lower
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Note: BCG and Charging Handle sold separately
Images may not reflect the exact item. Rail finishes may vary slightly due to the manufacturing process.
Pair with the Moriarti AR-15 Lower Receiver to complete your build.
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