I doesn't matter what country the product is made in if the people running the company are a bunch of scammers.
Now I don't know if Hashra are scammers or not. But their website display a lot of "concept" miners.
That's a warning sign to me. It's really not about US made or not, KNC is from Europe and lately their customer support have gone to shit.

So my point is that if you are looking for ASICs don't blindly pick & chose the miner with the best hashrate/USD. Rather investigate and see if the company is trustworthy or not.