I've never had any problems with my 111. I had a two peice weaver mount and a Bushnell Banner 6-18X50 on top. It worked fine, but i did put high rings on it. I have since went to a EGW 1pc base and there is no problems with ejecting or anything. Just make sure that you get the correct one, as there is a flat top and round top receiver. However, that is very easily determined by looking a the top of the action/reciever. Hope that helps