SANParks has missed the window to move rhino this year but has developed an alternative plan.
Police said officials recovered an unlicensed firearm as well as a rhino horn.
Thieves in Mpumalanga made off with 112 pieces of rhino horn, weighing 80,135kgs.
Bavaria Breweries and five major local retailers collected the money over the past few months.
The value of the horns has been put at anywhere between R150 million to R3 billion.
Nine people linked to rhino poaching have been arrested by the Hawks this week.