Is a person allowed to buy a handgun in Arizona at age 20 through a private sale? This is not for me, I am well over 21, but I was asked, and don't have the answer.

Yes.  There is no state law forbidding an adult from buying a handgun via a private party.

Here's the info. Under 21 cannot conceal carry but OC is good.

This is from the United States Code––––––––––––––––-


http://frwebgate.access.gpo.gov/cgi-bin/usc.cgi?ACTION=RETRIEVE&FILE=$$xa$$busc18.wais&start=1491535&SIZE=106587&TYPE=TEXT

It shall be unlawful for a person to sell, deliver, or 
otherwise transfer to a person who the transferor knows or has 
reasonable cause to believe is a juvenile––
        (A) a handgun; or
        (B) ammunition that is suitable for use only in a handgun.




(5) For purposes of this subsection, the term ``juvenile'' means a 
person who is less than 18 years of age.

Here's the two statutes where it says it's OK in the Arizona Statutes––––––––––––-





http://www.azleg.state.az.us/FormatDocument.asp?inDoc=/ars/13/03101.htm&Title=13&DocType=ARS





4.  "Firearm" means any loaded or unloaded handgun, pistol, revolver, rifle, shotgun
or other weapon that will expel, is designed to expel or may readily be converted to
expel a projectile by the action of an explosive. Firearm does not include a firearm in
permanently inoperable condition.





Now combine that with this section from the AZ Statutes ––––––





http://www.azleg.state.az.us/FormatDocument.asp?inDoc=/ars/13/03109.htm&Title=13&DocType=ARS


    A.  Except as provided in subsection C of this section, a person who sells or gives
to a minor, without written consent of the minor's parent or legal guardian, a firearm,
ammunition or a toy pistol by which dangerous and explosive substances may be discharged
is guilty of a class 6 felony.



     B.  Nothing in this section shall be construed to require reporting sales of
firearms, nor shall registration of firearms or firearms sales be required.



     C.  The temporary transfer of firearms and ammunition by firearms safety
instructors, hunter safety instructors, competition coaches or their assistants shall be
allowed if the minor's parent or guardian has given consent for the minor to participate
in activities such as firearms or hunting safety courses, firearms competition or
training.  With the consent of the minor's parent or guardian, the temporary transfer of
firearms and ammunition by an adult accompanying minors engaged in hunting or formal or
informal target shooting activities shall be allowed for those purposes.
From the ATF FAQs––––––––––––––––


http://www.atf.gov/firearms/faq/faq2.htm#b1


(B1) To whom may an unlicensed
 person transfer firearms under the
 GCA?               []







A person may sell a firearm to an
 unlicensed resident of his State, if he
 does not know or have reasonable
 cause to believe the person is prohibited
 from receiving or possessing
 firearms under Federal law. A person
 may loan or rent a firearm to a resident
 of any State for temporary use
 for lawful sporting purposes, if he
 does not know or have reasonable
 cause to believe the person is prohibited
 from receiving or possessing
 firearms under Federal law. A person
 may sell or transfer a firearm to a
 licensee in any State. However, a
 firearm other than a curio or relic may
 not be transferred interstate to a licensed
 collector.



[18 U.S.C. 922(a)(3) and (5), 922(d), 27
 CFR 478.29 and 478.30]





(B14) May a parent or guardian purchase firearms or ammunition as a gift for a juvenile (less than 18 years of age)? []




























JUVENILE SALE


Is it illegal to sell handguns to anyone under 21 years of age?  No






Arizona: State law restricts selling or giving firearms to juveniles
under 18, except for supervised loans of firearms or for limited lawful
activities (such as hunting). See also: Juvenile Possession.
Here's
a news link saying that North Carolina tried to limit handgun ownership
to 21+ and the Supreme Court found that unconstitutional since it
conflicted with US law.––––––––––––––––





http://www.wciv.com/news/stories/0508/521201.html


"But, a state law signed in April does allow private individuals to sell
handguns to people 18 and older. The ruling brings South Carolina in
line with federal law, which allows 18 year olds to own a handgun."
This
web-page has the information from the two attached files that make up
the pamphlet that the ATF distributed.––––––––––––––-
http://ecfr.gpoaccess.gov/cgi/t/text/text-idx?c=ecfr;sid=354aa5ef15a0f77baa40c0baa4c1ad6a;rgn=div5;view=text;node=27%3A3.0.1.2.3;idno=27;cc=ecfr





Just use Control+F (instead of searching the whole page) to find "unlawful for a person to sell" and this will get you to the same material that was included on the pamphlet.
Also on here if you dont want to look though the above.

Scroll down for the article titled  "Legal Age to Purchase or Possess Firearms in Arizona…"
 

Thanks guys! I will relay the info!