Borderlands 4 comes pre-loaded with an absolut glut (a gazillion, one might say) of guns to choose from, but even when it comes to orange Legendary guns, they're not all made the same. Some of them are simply better than the others, and Borderlands 4's Hot Slugger shotgun in particular is a standout piece of kit.
The Hot Slugger is a Legendary Jakobs Shotgun with a top-notch Perk: Blazing Barrel. Blazing Barrel gives you the following effects:
As the Hot Slugger is a Jakobs gun, critical hits also cause bullets to ricochet towards other enemies, which obviously plays well with Blazing Barrel. It gets better, though: the Hot Slugger only loads a single round in the barrel, which makes the gun a phenomenal pick for any reload-centric perks and abilities. Like, for example, Rafa's First Impression and Vitriol perks!

Getting the Hot Slugger is relatively straightforward business, but there's a big caveat in place: the quest to unlock the Hot Slugger in Borderlands 4 only opens up after you've already completed the main campaign in your given playthrough. That's because you need access to the - SPOILER ALERT - Bones of Sanctuary region.
If you've got that all sorted out, you want to go to Bones of Sanctuary and head north. Be on the lookout for the Craven's Nook Order Bunker, as that's where the Hot Slugger drops. There's really not much of a quest here, to be honest! You simply need to clear out Craven's Nook and kill the dungeon boss, which is the aptly named Callous Harbinger of Annihilating Death. Yeah, nobody ever accused Borderlands of being subtle, right?
There's a bunch of stuff to love about the Hot Slugger if we're being honest, even if we disregard its awesome Legendary Perk. It's extremely straightforward and easy to to obtain, as long as you can reasonably clear out Craven's Nook, and it's going to be a pretty high-level drop since you can only get it as a piece of post-campaign content.
We highly recommend farming for the Hot Slugger as soon as you can, as it's going to carry you through many, many encounters before you finally grow your character out of it.
It fires slugs. They’re hot.