basically, you can get any class 3 weapon with out the CLEO sign off, fingerprints, photos, etc. rob has a quick over view on his exeter arms website. he's the only class 3 dealer that i really talk to, the other ones seemed to busy or didn't care about my business.
so do the trust and keep the LEO's in the dark b/c its not any of their business what things i have. everything is still within the law. if you're looking for some class 3 info, the Armory section here is full of information.