Arguably one of the most simplistic handguns, Glocks are lauded for their ease of use and servicing, even for the individual. While most firearms enthusiasts can see how the handgun works by taking it apart (as I did), Glock does produce factory cut-away models, which 7.62x51n80 got his hands on and was kind to share with the world.
They are rarely seen in public (and never available for public sale) typically only reserved for armorer’s courses and a few tradeshows. The video is a great reference giving one the chance to see the parts in person versus the variety of animations that exist.