This gun is an awesome GBB. I have never owned the KWA USP, but i believe that the HFC version is a strong competitor. It has plenty of weight with a good crisp blowback, and it cycles flawlessly after lubricating the slide. the mag is pretty easy to load if you load it one at a time from the top, instead of loading it through the hole in the middle like the manual says. the fire selector clicks into place very well. the fire selector is a little stiff when you get it but it goes away very quickly. Accuracy is absolutely top notch. Much better accuracy than i would have expected. Full auto is fun too.
Overall very solid gun that performs very well.
Very fun too shoot
Recoil has plenty of kick
Crisp blowback and cycling.
Full auto can be useful in cqb.
Good range and power on propane.
Requires some lubricant on the slide out of the box.
Outer barrel wobbles somewhat.