The MagPul MBUS Rear Sight is of excellent construction and works great as a back-up sight.
It works perfect for use as a back-up sight for a red dot or scope but, in my opinion, it is not a replacement for a regular iron sight. By this I mean that it does not have the fine adjustments of a standard A2 type sight. It's great for back-up use.
Solid construction, the one I used took a good beating and did not fail. It also mounted solidly to the flattop I was using.
Overall, great for a back-up sight.
By
Jake from
US