I have to agree with most of the psters. Glocks are extremely easy to work on.
I have done extensive work to my Glock 24C and I am not a Glock Armor. This is no slight on Glock Armors but the Glock Armor class is a one day class that just about anyone can pass.
True gunsmithing is a different animal altogether. It takes years to develop a lot of the skill they posses.