Forged 7075-T6 aluminum upper with Criterion Core barrel, M-LOK Combat Rail HD handguard, and carbine-length gas system. Complete upper ready for your build.
This complete upper receiver group delivers serious capability in a compact package. Built on a forged 7075-T6 aluminum receiver with hard coat anodizing, it's engineered to handle demanding use.
Criterion Core Barrel — The heart of any upper receiver. This 10.5-inch chrome-lined, phosphate-coated 4150 CrMoV barrel features a 1/8 twist rate optimized for .223 Wylde chambering. The .223 Wylde chamber accepts both 5.56 NATO and .223 Remington ammunition, giving you flexibility at the range or in the field.
Carbine-length direct impingement gas system with M4 feedramps ensures reliable feeding and consistent operation. The threaded muzzle (1/2x28) accepts standard AR-15 muzzle devices.
The Combat Rail HD Series M-LOK handguard provides:
Note: This is a complete upper receiver group. You'll need to source a charging handle and bolt carrier group separately to complete your build.
A no-compromise upper receiver built by shooters for shooters. Whether you're building a home defense rifle, competition gun, or precision .223 platform, this upper delivers the quality and reliability serious shooters demand.