Here’s a quick release mount for a HK770 from Heckler & Koch. Just the bottom part of the rings I’m afraid. I’m told these will fit other H&K models too but I have no clue. Edit: Found this online: Factory Heckler and Koch HK05 quick release mount/base. Fits SL6, SL7, HK 270, HK 300, HK630, HK 770 and HK 940 Not sure we have any H&K owners here who’s interested but it’s worth a try. Extremely hard to find apparently. Price: 3500SEK shipped anywhere with insurance. Payments through Bank Wire only! Or another option I can discuss over PM. If you don’t want to use bank wire, shoot me a PM and we’ll work it out. No trades. Jim