I own a Cobra, not a Patriot, but a .22mag Derringer. I do not use it as a carry gun, because it is only 2 shots and too small a caliber. The workmanship seems good, and it has never malfunctioned. I've owned other derringers, and the Cobra is the most accurate one I've had.
They claim their guns are American made, which is a plus. I don't see anything on their web page that suggests a warranty, so that may be worth checking out.