They don't approve of the modification to make their firearm safe and reliable.
Who is they? is it Ruger or USPSA?
For the guy asking about 3 gun matches with short distances, I don't think he's used this for 3gun, just USPSA and steel, which are both relatively short distances (~30yds max).
I zeroed my red dot in this weekend and was able to hit paper plates at 100 bagged. No issues, but forgot to try the torque thing again. I ran it in USPSA a couple weeks ago and only had minor shooter imposed issues.
Great match results BTW!