Luke's idea seems the simplest and cheapest. I believe I have a piece of pipe that would work for that back in my apartment. I'll give it a try and let you know how it goes. I finished cleaning the gun and dry fired it last night and it cycled fine. The trigger at times seemed a little stiffer than my other two mags, but I couldn't be sure. The sear plate is a little bent but seems to move freely and I steelwooled all the corrosion/paint/crud off of it so I think that is okay.