There is a bunch of info on here if you look for it. Im about to walk out the door, otherwise i would post links for you, so please dont take this as a "SEARCH" post.
Tim has requested a position from the AG or DA, cant remember which, and they have been delaying it for i think a year. Park police have gone as far as to say that even if it is disassembled, locked in the trunk, and no ammo, they will still arrest you.
The law is technically void due to preemption, but if you get a MWAG call, expect to get a free ride downtown. At least in Clark County.