Hi Jer, yes! the "fxo" "code 122" thru center retaining pin / rivet, is the same whether it is on an aluminum or Bakelite bottom, It is a soft steel 3MM / .118" dia. X .800" long, and when squeezed between the two rivet sets, it expands the ends slightly, thus permanently holding the bottom on the tube?... Lot's of them have been pounded out and it's pretty tough on the magazine as a result? (Almost 100% breakage on the black Bakelite bottoms if not predrilled?) I try to make several hundred at a time, but man is it boring!!!!!!!

.... I haven't had much in extra time, so I will have to pass the ball to Lugerdoc, who generally keeps a good supply of my stuff on hand.... When he wants more, I'll probably make them then?

... best to all, til....lat'r....GT....