Sig Sauer Romeo5 1 x 20 mm with Riser Mounts (Black)Robust, compact red dot sight with 1x aiming solution optimized for today's MSR rifles, shotguns, carbines, submachine guns, and full sized handguns. Sig Sauer Romeo5 compact red dot sights provide civilians and armed professionals with a robust 1x aiming solution for any situation. Unparalleled Features Ultra low parallax, so point of aim is point of impact, and the red dot remains parallel to the bore of your firearm, regardless of your viewing