HK trigger housing clipping fixture

Simple clean fixture to hold an HK trigger housing in a vice. Fixture has a 1/4-20 stud and comes with a handy threaded knob, so it is easy to swamp out housings. I have used this this fixture now to clip multiple housings. It works on all housings for HK roller delayed platforms (MP5, 53, 91, G3, etc. and on both SEF and ambidextrous housings). This tool is not special but buying it from me will save you ~2 hours of engineering and fabrication time. So, the question becomes is $80 worth ~2 hours of your life? I think the answer is yes.