I think you are over complicating what my initial point was, which is that getting guns in Arizona is very easy.
Legally purchased in a store , personally bought and sold with legal intent, personal sold with no knowledge of buyers intent or personal with criminal intent is not the point.
You keep mentioning 4473, it ONLY applies to Retail sellers.
"Q: Is it legal to buy or sell a gun if neither party is a federally licensed dealer?
A: Yes, in Arizona, Utah and Nevada providing the seller or the buyer is not a prohibited person under Federal law. California has laws in addition to the Federal law, and all firearms transfers must be processed through a California licensed dealer. No one may bypass any law that applies in their State of residence. In general, you must be a resident of the state where the gun show is being held to purchase any modern firearms at the show. "
http://www.crossroadsgunshows.com/faqs.php
How about this stuff;
"On Monday, Gov. Jan Brewer signed two gun laws. One would forbid cities and counties from destroying weapons they obtained through gun-buyback programs. Instead, they must resell them so that guns purchased by police departments to get them off the streets will then be put right back on the streets."
Or,
"Ms. Brewer also signed another law on Monday, which updated an older statute.
Under the original, no government agency in Arizona was allowed to “require or maintain” a record of “the identifying information of a person who owns, possesses purchases, sells or transfers a firearm” — unless he or she bought it from a federally license gun dealer. The new bill
strikes that exemption and applies the don’t record rule to every gun sale, everywhere."
http://takingnote.blogs.nytimes.com/2013/05/01/keeping-guns-in-circulation/?_r=0
You can not say that private sales between law abiding citizens "can't" contribute to crime for the mere fact that a private seller would not get an honest answer if they were to ask a potential buyer if they intend to use it in a criminal manner.
"Similarly, a study by the Bureau of Alcohol, Tobacco, Firearms & Explosives (ATF) in June 2000 reviewed over 1,500 ATF investigations and concluded that
gun shows are a “major trafficking channel,” associated with approximately 26,000 firearms diverted from legal to illegal commerce.
7 According to the study, gun shows rank second to corrupt dealers as a source for
illegally trafficked firearms.
8 Another study explained that, while violent criminals do not buy most of their guns directly from gun shows, gun shows are “the critical moment in the chain of custody for many guns, the point at which they move from the somewhat-regulated legal market to the shadowy, no-questions-asked illegal market.”
9
Additionally;
"
Gun shows are a popular venue for “private sales” in which unlicensed sellers can sell guns without background checks. A 1999 ATF study found that 25 to 50% of gun show vendors are unlicensed.
10 These private sellers frequently rent table space at gun shows and carry or post “Private Sale” signs signalling that purchases require no paperwork, no background check, no waiting period and no record keeping.
11"
http://smartgunlaws.org/gun-shows-policy-summary/
Since you want to turn this into something, lets get real and realize that your 4473 point is moot.
So again I say, we all BUT sell them in Gumball machines here!
And again I say I am a gun owner and would not give up my rights as such.