You do realize that this would have had to be built and regulated prior to may 19th 1986. If there were 1 made it would be a post dealer sample and not available to the general public. On the .22 mp5 clones out there now use no existing hk mp5 parts. So no use of a registered sear. There is .22 Kits for the G3 that will run on a registered sear.