Face to Face sales must be with a person who is a RESIDENT of your state. If he has dual residency with CA and AZ then you're good but otherwise no.
From ATF:
(B1) To whom may an unlicensed person transfer firearms under the GCA? [Back]
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]
(B2) From whom may an unlicensed person acquire a firearm under the GCA? [Back]
A person may only acquire a firearm within the person’s own State,
except that he or she may purchase or otherwise acquire a rifle or
shotgun, in person, at a licensee's premises in any State, provided the
sale complies with State laws applicable in the State of sale and the
State where the purchaser resides. A person may borrow or rent a
firearm in any State for temporary use for lawful sporting purposes.
[18 U.S.C. 922(a)(3) and (5), 922(b)(3), 27 CFR 478.29 and 478.30]
(B3) May an unlicensed person obtain a firearm from an out-of-State
source if the person arranges to obtain the firearm through a licensed
dealer in the purchaser’s own State? [Back]
A person not licensed under the GCA and not prohibited from acquiring
firearms may purchase a firearm from an out-of-State source and obtain
the firearm if an arrangement is made with a licensed dealer in the
purchaser's State of residence for the purchaser to obtain the firearm
from the dealer.
[18 U.S.C. 922(a)(3) and 922(b)(3)]
(B4) May an unlicensed person obtain ammunition from an out-of-State source? [Back]
Yes, provided he or she is not a person prohibited from possessing or receiving ammunition.
[18 U.S.C. 922(g) and (n)]