https://www.pcgamer.com/gta-online-dataminers-uncover-second-red-dead-redemption-2-themed-weapon/

Last year, Grand Theft Auto 5's Chiliad Mystery hunters discovered alien life in San Andreas. Now, it seems the same datamining group has uncovered GTA Online's second Red Dead Redemption 2 weapon: the as-yet-unreleased stone hatchet. 

Similar to its RDR 2 golden revolver counterpart, the stone hatchet appears to be unlocked via a treasure hunt, this time handed down by Maude Eccles. The Game File Gurus sent us the following footage of the hunt in motion.