Quote from 7624452 : " Has anyone tried replacing the entire trigger assembly with one from a 2260 ?" I am going to check that out tomorrow, I have an extra trigger group to try it with.
I honestly have no idea what those ribs are for? They do not interfere with the 2260 trigger frame. Here it is (without hardware) installed on my 362. Drop in replacement. Seeing is believing I suppose. irregardless... it is plastic. I won't use it and neither will many others, but it is an option.