I think there's a bit of a misunderstanding on the balancing here, in my opinion. Out of those 11 cops, how many have a 7.62? Probably 2-3, at best. They're going to be vastly less powerful than your group of (hopefully) 8+ players. You're going to have so many tools at your disposal. The APD has policy that needs to be followed, on top of 95% of the force only having access to 6.5mm weaponry. It's a balancing act, you need to look past the numbers.