Simple problems demand simple solutions. AT3's Pro-Mount risers do just that, offering two different heights for co-witness with backup sights, while remaining lightweight and appropriately rugged.
The Pro-Mount risers work with wide variety of micro red dots that attach to Weaver or 1913 Rails. Depending on your personal preference for sight height, you may opt for the 0.83" Riser, or the 1.0" Riser.
If you like your sights all on the same plane, or don't plan to use backup sights, the 0.83" Riser is a good fit. It's what most folks tend to prefer.
If you prefer a less obtrusive view with backup sights deployed, or find yourself hunching to get a good sight picture, the taller 1.0" Riser may be right for you.