Hey, I personally believe that we should have real gun sounds and real weapon models, purely for immersion. I know that some players do not have weapons but if you do having that realistic texture and sound just makes the roleplay feel more realistic. Guns such as the glock 17 could replace the pistol and the glock 18 could replace the ap pistol. UMP-45 for the combat pdw as swat seem to use that weapon.
In conclusion, I believe we should have some (possibly not all) models changed or retextured but I definitely think that realistic gun sounds will make roleplay feel more immersive.