This is my first post. I am planning to build the SGN-22 as the articles come out, But I want to build the hammer, sear, disconnector and trigger as well. I found a non dimensioned drawing that appears to be to scale, but I am not sure. I figure that if I had some real dimensions to work with I could develop a cad model and drawings to build the components from. Would someone be willing to measure the length, width and thickness (hammer itself and trunnions) of an AR 15 hammer. I will be glad to post the files I generate in return.