In this video, I disassemble & then reassemble the Glock 19 slide, & all the parts inside it. I then disassemble & reassemble the Glock magazine. This is the third video in a 3 part series. In the first we disassembled the frame, and in the second we reassembled the frame. This is a Gen 3 model with no changes or modifications. However with all the parts out you can easily swap parts if you wanted to.