No kidding! I was doing some fun run/gun style shooting on the range a year ago and the federal guy was pretty slow. I suggested they try using the gear I use. So next shooting the Federal guy came out wearing running shoes, a T-shirt and shorts instead of the 40 pounds of work gear he was wearing the previous time. We both agreed that it was way faster, easier to get into position and helped get better accuracy at speed. I fully expect his agency to be dumping the soft body armor, hard body armor, duty boots, cargo pants, belt, radio, duty pistol etc as patrol gear. Much quicker and more accurate.
Don't even get me started on their patrol cars. Supped up Civic or go home. Those patrol cars are so slow and don't even handle well. Geez, they need to get a clue.
Not so true story...
Don't get me wrong CreamySmooth, your Avatar is cool and your posts are entertaining.

The above point was simply to show you the difference in use. What works on the range for your type of shooting might not be suitable for a patrol carbine due to factors that you would never consider or encounter on the range. Something to think about. The car analogy was also designed for this. The Crown Vic is a piece of crap, yet it was a good patrol car. Not fast, handled poorly but was big enough and tough enough for the job and wouldn't break down after idling 24/7 unlike many much quicker vehicles.
Oh and as a monolithic upper AR goes, I like my C8IUR rifles, but I still prefer my LMT mrp rifles a bit more.