The AR-15 5.56/.223 18" Stainless Steel Straight Fluted Tactical Upper Assembly is engineered for precision, performance, and durability. Built around a .223 Wylde chamber, this upper offers maximum compatibility and accuracy with both 5.56 NATO and .223 Remington ammunition.
The 18" 416R stainless steel HBAR barrel is straight fluted to reduce weight and improve heat dissipation. With a 1:8 right-hand twist and button rifling, this barrel excels in stabilizing a wide range of bullet weights, making it ideal for both long-range accuracy and tactical use.
The upper is finished with a black nitride triport muzzle brake and 1/2x28 threading, improving recoil management and muzzle control. The included 12" mid-length M-LOK rail allows for the easy attachment of accessories without adding unnecessary bulk.
Caliber: .223 Wylde (compatible with both 5.56 NATO and .223 Rem)
Barrel: 18" 416R Stainless Steel, HBAR Contour, Straight Fluted
Twist Rate: 1:8 RH, Button Rifled
Muzzle Threads: 1/2x28 with Triport Brake and Crush Washer
Feed Ramps: M4
Gas System: Mid-Length Stainless Tube with .750 Low-Profile Steel Gas Block
Receiver: A3 Flat Top, 7075-T6 Aluminum Forged, Hardcoat Anodized
Handguard: 12" Free Float Slim M-LOK, Aircraft-Grade Aluminum
Finish: Black Hardcoat Anodized
Weight: Approx. 4.7 lbs
Compatibility: Fits any standard AR-15 lower
Note: BCG and Charging Handle sold separately
Images may not reflect the exact configuration. Finishes may vary slightly.
Tags: ar-15, 5.56/.223, 18 18 18", stainless, steel, straight, fluted, upper, 1:8, twist, 12", m-lok, triport, muzzle, brake, moriarti, arms