Jeidanten provides a detailed walkthrough of the VFC Umarex Glock 45 MOS gas blowback pistol, covering everything from basic disassembly to advanced performance upgrades. The shop guy demonstrates how to separate the slide from the frame—warning viewers to mind their fingernails during the process—and explores the internal components, noting which parts are made of durable steel versus alloy.

A significant portion of the presentation focuses on custom modifications, such as installing a precision inner barrel and a reinforced hop-up rubber to improve accuracy. He also shows how to swap out the standard iron sights for self-luminous ones and how to use the various adapter plates included with the MOS version to mount different red dot optics. He emphasizes the importance of not pulling the slide while the optic cover is off, unless you enjoy hunting for tiny springs that have launched themselves across the room.

The final segment covers practical accessories and operation, featuring a variety of holsters including quick-draw and light-bearing models. After demonstrating how to properly fill the magazine with gas and BBs (hidden beneath a realistic baseplate), he conducts a chronograph test to measure the pistol's power. The demonstration concludes with a reminder that the trigger safety is your best friend, as long as you keep your finger off it until you are actually ready to make some noise.