When you're ROing a stage, and you're either running the timer, scoring, or both, how often do you check that the shooter is shooting the firearm listed on the score sheet, and that the firearm is eligible to shoot in the corresponding division? I typically confirm that if the sticker says G17, that I see the G17 on the side of the slide. At the last match I noticed a few other competitors waiting to shoot talking about their stippling and grip reductions on otherwise stock looking guns. Now, I did not run them, but I have some doubt that they were running in unlimited, but they very well may have been. So I was just curious if, as an RO, you saw someone with stippling or a grip reduction shooting in AMCiv or Comp that you'd call them out and/or refuse to run them on the stage.