Another way to mount optics on your pistol is to use its under rail with a product like the Kinetic Concealment CompRail Combo which already comes with an RDS... "This is a combo kit that includes one RD-01 Red Laser Dot Sight and one CompRail System. This combo kit is designed for the 3-Gun Shooter or anyone wanting to do some handgun target practice. The kit fits all 1911 pistols with rail, Sig 250, Smith and Wesson M&P Full and Compact, and Beretta 92 and 96. Will not fit models with one one rail slot or sub-compact pistols."