here are a few of my ideas going forward for new weapons:
Double Pistols
two normal-ass, glock-like pistols. click repeatedly to fire like guns akimbo, but with weaker bullets and a generally faster cycle time. the bullets don't reach very far, but they fly quickly and don't do knockback, allowing you to do more damage without having to move back into range
Double Shotguns
two lever action shotguns, side-by-side. firing causes you to shoot both shotguns, not only propelling you backward some distance but causing a literal explosion instead of two individual shotgun blasts that does high damage but is utterly incapable of reaching enemies at long range.
Plasma Bolt
a long-barreled launcher-like device that charges when you click, and fires automatically if you don't click after some time. click and hold to prime, but not actually fire, then release to let go of your charge. firing with no charge gives you a weak and sort of worthless little plasma dart, but clicking rapidly and wildly causes the gun to charge energy, then release a gigantic supercharged metal bolt that explodes on impact, powering up to a possible instant kill
Ballista
literally just a ballista
like, a medieval siege weapon. that you carry around on your shoulder. fires a headshotting round that travels quickly and explodes like the spear, but must be loaded before it is fired and reloads itself automatically when you equip it. hideously lethal to single targets, but on the grandest scale sort of inefficient.
Icicle Cannon
an assault rifle that fires gigantic, nailgun-like spikes full of a freezing element. hitting a target causes them to slow down briefly, allowing you to lay into them with more ridiculous murder-icicles. damage is roughly on par (maybe a little worse) then the sawblade rifle, but it makes up for the lack of flat damage with a better chance of a successful kill
Firework Rifle
an assault rifle that fires incendiary rounds, causing targets to burst into flames. bullets that hit cause the target to fly backward some distance, but the gun does high damage and does lots of afterburn. unrelatedly, firing causes a jet of superheated air to fly out a side port. that part's mostly for show.