4th Horseman is so bad it doesn't even have an actual exotic perk. It has Final Round as its first unlock and then Return to Sender as its second. Neither of these are exotic in the slightest. My solution: Change "Return to Sender" to an exotic perk named "Rider of the Apocalypse" and let the effect be that kills with that weapon always return at least 1 round to the magazine with a chance to fully refill the magazine. (Or just flat out refill the mag similar to Bad Juju) Maybe a little strong but it balances out with its shitty range so its not even close to being "OP" in PvP. I would use it then.