This is in the end why I dont bother being anal over it. 9/10 the only people who are going to report you for violations are other gunners who are obsessed with the letter of the law.
In the past four years, three gun purchases from major papered dealers have been of rifles I later learned were violating secion 922r of the BATF code, one of the dealers has been audited by the ATF in that time and got a clean bill of health when I SAW, clearly 922r violation rifles in their shop on display during such audits.
I've made it a point to talk to ATF agents on as many occasions as I could. To be honest if you cant beat 'em, I figured I might look into joining the tech branch. Lets me play with guns for a living right? Anyhow, as these posts have confirmed what I discovered, they're more concerned with the proper form than what you've got in your gunsafe at home. Do something to piss the government off otherwise? Watchout, like Elliot Ness and Al Capone. They may never pick you up on a AWB violation but if they pick you up for something else they'll fry you with every violation in the safe as well as every time you ever spit on the street or j-walked.
Of course, I dont actually own any guns either. Lost during a tragic fishing accident. I took my safe along to hold my beers and it fell overboard. Tragic tragic accident. Crater Lake Oregon too- one of the deepest around. ;)
Ryan