Make sure 24 hours elapses between the actual transfer of the firearm and the "application for purchase" of the firearm (rifles):
5/24-3. Unlawful Sale of Firearms
(g) Delivers any firearm of a size which may
be concealed upon the person, incidental to a
sale, without withholding delivery of such firearm
for at least 72 hours after application for its
purchase has been made, or delivers any rifle,
shotgun or other long gun, or a stun gun or
taser, incidental to a sale, without withholding
delivery of such rifle, shotgun or other long gun,
or a stun gun or taser for at least 24 hours after
application for its purchase has been made.
Although the 24 hour wait may not matter since this is not a sale. But might as well put it on the receipt/bill of sale anyway just to be safe.