I need suggestions on a sight replacement for my Springfield Armory Mil-Spec 1911. The gun itself groups well but shoots very low especially with 230 grain ball. I would like to get an adjustable rear sight that fits the existing dovetail. I looked at Bo-Mar for example but don't want it to hang over the rear of the slide. I would prefer low adjustable rear sight with three dot sight picture since the existing front sight has the dot, Any suggestions that's not a hassle to put on?