Selling my compete 6mm ARC upper. Barrel is a 20in medium stainless barrel from Satern with a 20moa rail. I added an Odin Works adjustable gas block. Comes with the factory muzzle break and lots of extras for reloading. I have quite a bit of brass, powder, bullets and a Hornady Match Grade die set. Barrel has between 350-400 rounds thru it.