Weapons should have suppressors up until 5.8mm then the supressors should be expensive for 6.5 and rare/expensive on the forums for 7.62.
Suppressors should NOT be so easily attainable, it offers so many unfair advantages. You can't shoot what you can't see. So this means as a counter measure police need to use things such as darters to meet pair up with rebels/UNMC.
If the community wants to better it'self i would say that this would be a great starting point.