Sometimes, a ROF increase can decrease the effectiveness of the gun. Also as a person who enjoys historical accuracy, having an STG fire as fast as a PPSH is just too much. Yeah i want the damage and - shot deviation, but i cant have them without having ROF upgrade.
Something like:
STG
M1A1 Thompson
BARs
MG34
Really dont need more ROF, and isnt historical ROF which i dont like that much. So i have to run unupgraded guns most of the times
So please add an option to chose which mods you want to have on your weapon.