Just used this on my Wilson 24” Bull Barrel, and all I can say is WOW! It doesn’t get any easier then this! I slid it on the barrel, selected my spacing, lined up and tightened the set screw, drilled for approx ten seconds, moved over, repeated, then removed. Dimples were perfect and when I installed my SLR gas block it was perfectly aligned. Don’t think it could be any easier.