Starfield has a ton of weapon mods to muck about with—not the kind you need a script extender for, mind you. I'm talking about the vanilla crafting system: If you drop a few points into the Science skill tree, you'll be able to craft all kinds of mods that blow the doors wide open on the game's build variety.
One such combo is the Hornet Nest mod, slapped onto the Coachman shotgun. This thing makes your gun explosive, scattering rounds directly downwards from the point of impact—which can just be the sky, as they explode after a certain distance anyway. Here's a great example video from iSwearSheWas56 on the Starfield reddit.
I'm mostly just shocked at the range. It's one thing to turn a spacer into a fine mist point-blank, it's another to fire over a wall and spew molten metal at the poor sods on the other side. And mechs were considered too much for space warfare? I don't even think you need grenades with this thing. It looks like it renders them completely obsolete.
To do this yourself, you'll need to dump two points into Weapon Engineering and scrounge around for three Lead, three Adhesive, and three Tetrafluoride. Lead's pretty common, and you can buy Adhesive from most general stores—Tetrafluoride's a little more rare, but if you're in the Schrodinger III for this busted XP farm, it's just a quick jaunt over to Schrodinger VIII-b to get some. The system that keeps on giving.
I'm not one for crafting systems in most games, but this has fully tempted me. Look at this thing. I just wish I didn't have to bust open a wiki to cobble something like this together. Plus, you have to spend the prerequisite points in stuff that isn't about melting my foes from above, since Weapon Engineering's on the second row of skills.