I put this Volquartsen Scorpion together over the past two years, finally finishing it this week. The only Ruger part is the magazine. Grips, for now, are Hogue. The rest of the pistol is composed of Volquartsen parts that I accumulated as deals became available. The Volquartsen frame is anodized in a red that is more pink than red. That led to a substantial discount that frugal me likes.
I was able to shoot the "break in" rounds using S&B Subsonic (40-grain at 1017 fps). No functioning issues and twenty-five yard ten-shot groups went into less than an inch. The comp that came with the upper (it had a comp but no sights) means what little muzzle rise there was is gone. I always thought a comp on a .22 was just a way to extract money from my bank account, but the muzzle rise is exceedingly well damped. I need to shoot on the timer with and without the comp to quantify the impact.
The comp is easily removable, which is good because it leads something fierce. I have been soaking the comp in a 50/50 mixture of vinegar and 3% hydrogen peroxide to loosen the welded powder and lead, but I just ordered the Volquartsen "lead pulverizer" as the vinegar/hydrogen peroxide solution is a bit messy. The solution will also etch barrel steels as it is an oxidizer. With the comp being made of anodized aluminum, it should not be an issue; but less exposure to chemicals has to be a good thing. For that reason, I may just remove the comp and replace it with a thread protector for shooting where a bit of muzzle rise is not an issue.
The other negatives of the comp are noise and spraying lead. The latter is one of the reasons this pistol does not have an optic. The other is I wanted a lightweight pistol in the vein of the Colt Challenger.