US Optics has become a dumpster fire of a company since they were bought out by their current ownership group. They farm out the majority of their optics now from China, and the only scopes they make in-house in the US are the Foundation series FDN scopes (former SN series). Unfortunately the FDN series no longer uses exclusively Schott Glass from Germany, and they’ve been sourcing glass from wherever they can get it depending upon supply. This comes directly from USO when I talked to them at SHOT. Their scopes were once “Alpha Tier” scopes, but now they’re back down a level and even with the Leupold Mark5 and Vortex Razor HD Gen2.
Of those, I think the Leupold Mark5 HD offers the best of all worlds. You have a light scope, affordable price, great glass, and quality features. The scope uses mostly US components with Japanese LOW glass. Other options include the Burris XTR-III, Vortex Razor HD Gen2 and Steiner T5Xi.
Nightforce ATACR, S&B PMII, Hensoldt, Kahles, Tangent Theta and Zero Compromise Optics are all alpha tier optics, but you’ll have to pay to play with them.