Sure, here's a couple of shots. It's got the standard ball detent in addition to the spring loaded plunger. I guess someone wanted to make sure it locked up solid.
I also noticed that there are some letters and numbers stamped in the ejector rod recess on the barrel and was wondering if anyone knew if they might give some clue as to who did the original conversion. They are:
K 11 89 4 CK
Does that mean anything to anyone?