Was in the range today. Tried to determine the relative accuracies of the  Glock Original Equipment Manufacturer (OEM) barrel and  the aftermarket Wilson Match barrel for the Glock 21. Shot from a distance of about 7 meters. Ammo used was the Armscor .45 ACP. Three trials with five shots for each trial. Seems that the Wilson Match barrel is the more accurate of the two. I more or less had an inkling about this but needed experiments for confirmation. Wilson Match Barrel Grouping Glock OEM Barrel Grouping First Try Glock OEM Barrel Grouping Second Try Wanna kill these ads? We can help!