So I have a Rock Island Armory M1911-A1 FS Tactical II on the way and would like to change out the rear sight to something a bit more adaptive to one handed slide manipulation. Is it possible to put a Sig P220 type rear sight on a 1911? I have never been a big fan of the combat rear sight like on a G.I. issue though it wold work for that purpose, the sight picture, for me, is horrible. And only having the use of one hand, it is imperative that the rear sight can handle that kind of abuse/use. Any ideas or recommendations are welcome.