I'm thinking about having a single stack 1911 built with an Optima sight and a compensator. Is there any competitions besides Open class where this configuration would be legal to use? I've been told that a single stack 1911 would not be competitive in Open class if I decide to start shooting competition with it. Would it be better to build on a hi-cap frame if I'm going to put optics and a compensator on it or is there any competitive purpose to have a single stack 1911 with optics and a comp. Thanks.