It's something I'll keep in mind, but back on topic here, since this thread is in fact about the KWA USP 45, and not about AEG's. I don't see why this couldn't be a splendid primary gun if you consider that there are never more than 1 AEG in my airsoft games, and everyone else has LPEG's/LP C02's from Walmart. 300 FPS would be amazing, and the hopup would give it some more range IMO.
Edit: Try $299 for a TM AK at AA. Also, there are a lot of hidden fees involved in purchasing an AEG, especially when you consider how much you could spend on 1 games worth of BB's. (I am a noob, and I sound like it, but I decided a while ago that I didn't want to invest that kind of money into this hobby. $299 base price + upgrades + extra magazine + battery repairs + shipping = way more than $299. I believe in saving money for better things, rather than blowing it all on 1 airsoft gun, and I have many other interests besides Airsoft although it's hard for many of you to believe.)