Upgrade your AR with strength, style, and reliability. The Moriarti AR-15 5.56 NATO 16" M4 Carbine Upper Assembly combines a classic M4-profile barrel with a modern Diamond Cut M-LOK 12" free-float handguard, delivering superior heat management, precision, and aggressive styling. Whether you're building a patrol rifle or a lightweight carbine, this upper is engineered for performance.
Barrel:
Length: 16"
Chamber: 5.56 NATO
Material: 4150 Chrome Moly Steel
Profile: M4 Contour
Twist Rate: 1:7
Thread Pitch: 1/2x28 TPI
Muzzle Device: A2 Flash Hider
Gas System: Carbine-Length
Gas Block Diameter: .750"
Upper Receiver:
Type: A3 Flat Top
Material: Forged 7075-T6 Aluminum
Finish: Mil-Spec Black Hardcoat Anodized
Includes forward assist and dust cover
Handguard:
Type: 12” Free-Float Diamond Cut
Attachment: M-LOK
Style: Lightweight and aggressive profile
Material: Aircraft-grade aluminum
Color: Black
Fits all standard AR-15 mil-spec lower receivers
Compatible with .223 Rem and 5.56 NATO ammunition
Complete Upper Assembly (barrel, upper receiver, handguard, muzzle device)
Bolt Carrier Group and Charging Handle not included
Images may not be an exact representation of the product. Handguard cuts may slightly vary, maintaining the same premium quality.
Complete your build with the Moriarti AR-15 Lower Parts Kit with Enhanced Trigger Guard
Tags: moriarti, ar-15, 5.56, nato, 16 16 16", carbine, upper, 12", diamond, m-lok, flash, hider