I am just back from the range from getting my factory build Glock 23 from Mark at Summit Guns (http://www.summitgunbroker.com/). I have got to had it to Mark for having some of the best deals out there for factory rebuilds. It almost seems to shoot better than a brand new Glock. The first 50 rounds went through the firearm without any issues. The high cap mags are almost tighter than new ones. The sights were straight on. If your looking for a Glock give Mark a shout.