Are all variants of the USP ambidexterous? I read that variant 2 puts the safety/decocker on the right side of the receiver, which would be correct for me but I'm wondering if other variants can be switched for LH use. Any help?

I have owned three( 1 std and 2 compacts)--all were ambi--

That said-- HK has changed the guns (a bit) a couple of times--
I would contact H K --

They were always helpful when I asked for assistance.

http://www.hk-usa.com/civilian_products/contact.asp

Thank you. I'll call them tomorrow.