I have a scorpion carbine and decided to get a pistol, too. I outfitted it with a brace and haven’t had much luck zeroing iron sights. It made me worry that the barrel needed tightening or reseating. Well, I installed a red dot and zeroed it at 25 yards last weekend. Then today I shot it at 50 yards and am astonished how accurate it is. My first shot at 50 yards was dead center; then I shot 2.5 inch groups, easily.
Just so impressed with this handy little gun. So much fun to shoot.