Wouldn't count on KWAUSA to supply you parts.
It's been over 8 months and they have yet to stock their USP triggers.
http://store.kwausa.com/partskp45gas...ssembly-1.aspx
Also be weary ordering from Asia, especially if they don't meet the fps requirement.
There are other means of shipping pistols to you, but chances of it getting confiscated it 50/50.
You could get Age Verified and look at our retailers and classified, often see USPS for sale.