SCAR - More recoil
M12 Nova - Slightly more power
Hammer - Higher rate of fire
Feline - Very slightly more spread
K-VOLT - Faster projectiles, more power
Jackal - Less spread for auto, more spread for single-shot
Marshall - Is currently worse than Jackal's single shot. I checked the code. Way less spread should fix it.
Grendel - More power
MK60 - It's fine
And that's how you balance all the weapons I've used so far

I don't think I've ever fully agreed with someone on this forum before. Kudos