Just got my Glock from the customs and wanted to write a short review.
I would rate the overall build quality with about 3 - 3.5 out of 5. Right out of the box, all the edges were very sharp, the gun had almost no oil and would jam all the time. After I filed down all the edges and lubricated the mechanism, it started working more or less well. Yet the trigger pull is awful, the trigger bar spring is very weak and the trigger bar keeps scratching against something all the time.
Also part 81 fell out, nevertheless the guns seems to operate fine without it. Any ideas what's it for? )