what exactly you mean with "gunplay is too slow"? TTK, or weapon handling, recoil, or?
rng (if you talk about recoil) helps balance game as we have small player base where high skill players have to play against low skill players.
What i would advise is to toy with lowering visible recoil and ads speed.
Lowering recoil? It's already very low... and ADS is fast. Which games are you playing? We have similar speeds to COD and CS for guns, and movement is much faster.