If you are using your money to make a purchase you are the buyer. If you are using someone else's money you are not the purchaser. My wife has bought me many guns for Christmas, Birthday, Father's Day, etc. But she was always the purchaser even though they were intended for me...even at the time of purchase. You can not gift a gun to a felon no matter who paid for it.
Romans 1:16 I am not ashamed of the gospel, because it is the power of God for the salvation of everyone who believes: first for the Jew, then for the Gentile.