My shooting background is Bullseye Pistol Competition. What is a reasonable expectation of my new Gen4 Glock 19 at 50 yards? Is minute-of-pie plate ( 8 inch circle) doable with stock pistol? How much , if any, would a KKM Barrel or other quality aftermarket barrel help accuracy at that distance. The 3-dot sights are a distraction , but sight black fixed that pretty quickly. Thanks for any suggestions or help with this!