either ammunition ideas or turret ideas, you can do multiple in one message as long as you separate them.
here's an (as in 1) idea of mine:
prism gauss cannon ammo box
craftable with 2 quartz, 4 fulgurium, 2 lithium, 4 zinc, and 2 aluminum / an empty gauss ammo box
acts like exploding ammo a little, but bursts into shards of quartz and 3 to 7 arcs of lightning, stunning targets and dealing heavy burn, organ, and internal damage with light bleed.
targets close together will end up getting shocked as a group rather than just 1 being affected, & less damage is dealt to individuals bunched up rather than one dude getting hit by a ♥♥♥♥♥♥♥ lightning bolt from 3 kilometers under the sea.
doesn't deal damage to armor but rather bypasses it.