Penal Code § 28150
ARTICLE 2. Form of the Register or the Record of Electronic Transfer
As used in this article, the following words have the following meanings:
(a) “Purchase” means the purchase, loan, or transfer of a firearm.
(b) “Purchaser” means the purchaser or transferee of a firearm or the person being loaned a firearm.
(c) “Sale” means the sale, loan, or transfer of a firearm.