MWS 16" has a 3-12X S&B w/ Aimpoint T-1 at 1 O'Clock on a Spuhr mount. Not too happy with it because it is bulky.
One of my AI's has a 5-25X S&B w/ Trijicon RMR at 1 O'Clock on a Spuhr mount. I'd like something a little more rugged than the RMR. It can also get washed out by white light. The T-1 is perfect but it really should to be smaller.
Before that ran a Trijicon Red-Dot (forunner to RMR) in a Matt Burkett offset mount that clamped onto 1919 rail on a 18" AR with a Short Dot. The mount puts the red dot sight at 2 o'clock.