All that would do is keep them from using CS or flash bangs.
No, in various jurisdictions they would also not have "assault weapons" and high capacity magazines. Which they basically have nowadays purely for intimidation, not any tactical need. They can have a rifle that looks like an ordinary semi-auto deer rifle, they can have 10-round magazines. Which is basically what they did when they were spending their own department's money pre-911. Pre-911 my local Sheriff's department had a 12-guage Remington 870 shotgun and a Ruger Mini-14 rifle with a 20-round magazine in patrol cars, the county had sizable rural sections so occasionally they needed a little more range than the shotgun provided. They considered M-16/M-4 but they determined the Mini-14 with a high capacity magazine had the exact same performance at half the price. Once the federal money and surplus became available post-911 they switched to M-4 since they were now free/cheaper.
Plus they would be prohibited from full-auto.