Welcome to Reno!!! I live in Sparks.
Blue Cards are for registering hand guns only, and these only apply for Clark County (Vegas area). There is no registration up here in the Free North. You brought your guns with you, you own them, end of story.
You are required, not by law but by principal, to go out and get the "real" magazines for your Glocks. Full capacity, none of that wimpy ten round stuff. Get some "rea" magazines for your M4 as well, and put a pistol grip on it. Everything else California said you can't do you are required to do.