This is a replacer for the regrettable iron sight that is standard on it. So I bring to you… a reflex sight for the 10mm Submachine Gun. This needs a reflex sight.” You know the next part. “Where’s the front sight!?” was my immediate thought, followed by “Where’s the nearest weapons workbench. Most people can relate to the disappointment I felt in the game the first time I aimed down the sights of the 10mm Submachine Gun.