My issued AR with my last department was a plain jane M&P 15. Optics and light were a no-no.
Here's my personal AR that I built myself.
Stripped M&P lower with DD internals
Troy drop-in battle rail
Troy folding rear sight
Sling is a Magpul MS2 that I'm running as a 2 point in a slightly unconventional way.
Optic is a Primary Arms micro red dot. I've been very inpressed with this optic, especially considering the price. For my purposes its all I need.
If this rifle ever ends up as a duty weapon, I'll spring for a real Aimpoint Micro and add a light.