The receiver in the pictures above is 7075 aluminum buffed to a shine.
I made quite a variety of barrel styles since I am not sure what will be popular. So far I have stainless and black oxide, in threaded and non threaded, in two lengths and two diameters. So there are actually 12 variations. These are all lightweight barrels, so the balance is quite nice. And you can clock the feed ramp and the sight independently, so it’s an easy installation on the Zero Percent and a retrofitted Ruger MK.