Simple is better.
A1 sights don't do as well at CQB. The A2 sights have a bigger close range aperture and are much easier to acquire. We have M16A2 carbines with A1 sights, and we have either drilled out one of our apertures or replaced the rear sight with a larger aperture sight. It makes a very big difference on rapid acquisition.
Scopes are all well and good, but what are you using the rifles for? Your officers should rarely, if ever, be in a spot where they will need a scope to get an accurate hit, and a suspect at scope ranges will often not pose a threat that can be lawfully engaged with deadly force. A scope of any type is just something else to break, and most of your applications, Patrol or Detectives, will be at CQB ranges, where iron sights (maybe with tritium inserts) will be much quicker to acquire.
One of our snipers uses a Trijicon on his carbine, but his zero tends to drift. The illuminated reticle is nice, but the rest of us never even bothered to draw them from the armory. I use the rifle close in, and the scope just gets in the way.
Go spartan. Rifle. Tac Light. Sling. It has the additional benefit of being an easier sell to Admin and gives you fewer items to get bids on.