But yours has a p-p lower. :wink:
I tried to answer the first part of the quote 'Never seen or heard of a Qualified Manufacturing registered receiver, or ...'.
I had asked them to send the fom 4 on this one. It is attached. Definitely looks like a registered receiver to me and I don’t see anything that would indicate it is a pushpin.
Unlike the Vollmer conversion HK51 that was recently listed on gunbroker. It was actually a qualified sear and someone got a deal for $26.5k.
in drag racing that button would be the "oh sh#t" button. Could be the same :30:
I believe this plug receptacle was for some sort of "kill camera" that records shot placement. A hell of a long time ago I saw a couple of these ancient cameras that were mounted underneath rifle barrels. They had wires coming from the camera body that clipped into the trigger assembly. When the shooter fully squeezed the trigger a picture was taken of wherever the rifle was pointing to. I think this same type of setup was also used on olden days lasers. Partial movement of the trigger would activate the laser while full trigger movement would fire the shot. This receptacle is a remnant of yesteryear. Hi-Yo, Silver! Away!
HK PSG1 :wink: