Before I start this is not a bid to get over powered weapons for the Police Department or a complete overhaul of the weaponry.
1st I would like to see the Combat Pistol replaced with the Pistol MKII instead of a Combat Pistol and .50, this is a more powerful than the Combat Pistol but less powerful than the .50 that POII's and higher now have as standard issue. Having a Pistol MKII could replace the need to have a .50 which is an unrealistic weapon for standard officers to have (that we currently need to, to have a chance of winning any type of gun fight).
2nd I would like to see the Micro SMG and SMG replaced with the SMG MKII, this gun was modelled after the MP5K which is standard issue for SWAT. It can also be used whilst in a vehicle which the SMG cannot meaning that the need for the Micro SMG is voided.
Finally I would like to see the Shotgun replaced with the Shotgun MKII, the MKII is a more modern version of the standard Shotgun which I believe would be more realistic for the Police Department to be armed with.