Radian Weapons Model 1 Complete Upper 6mm ARC 18" M-LOK - Black Nitride

The Radian Weapons Model 1 Complete Upper is a fully assembled 6mm ARC AR-15 upper receiver engineered for the modern precision shooter. Built by Radian Weapons in the USA to the same standards as their complete Model 1 rifles, this complete upper drops onto any mil-spec AR-15 lower and gets you on paper with no assembly required.

At the core is a precision 18-inch match-grade steel barrel finished in Black Nitride for excellent surface hardness, corrosion resistance, and easy cleaning under field conditions. The barrel is cut with a 1:7 twist optimized to stabilize the broad range of 6mm ARC supersonic and subsonic projectiles, and is threaded 5/8x24 for compatibility with standard muzzle devices and modern suppressors.

A precision-machined 17" M-LOK handguard wraps the free-floated barrel with ample real estate for accessories while keeping the profile slim, rigid, and ergonomic. The handguard pairs with a rifle-length gas system tuned specifically for the 6mm ARC, keeping felt recoil and cycling sharp across the full pressure spectrum from subs to supers.

The Model 1 Complete Upper ships ready to run. It comes out of the box with Radian's ambidextrous Raptor-SD charging handle, a matched bolt carrier group, and a pre-installed Dead Air KeyMo muzzle brake, making it suppressor-ready the moment you mount a KeyMo-equipped can. Drop it on a Radian Model 1 lower or any quality mil-spec lower and it delivers the accuracy, reliability, and refined controls Radian Weapons is known for.