VQ=Volquartsen
https://www.volquartsen.com/product/...or-ruger-mkiii
I have been told they are amazing but I've never bought one since they currently run half of what I was able to buy my MK III for a while back.
I have a BSA red dot on my MK III and it's not "bullseye pistol" level but it sure works well for my level of .22 shooting.