Jeidanten does a quick overview of the Umarex/VFC Glock 19 Gen5 MOS. This model features a Modular Optic System (MOS) design, which includes a removable cover on the slide for the installation of various red dot sights. The replica follows the external specifications of the fifth-generation firearm, including an ambidextrous slide stop and a flared magazine well.

They go over the internal components reveals a mix of metal and nylon materials. The slide and outer barrel are constructed from metal, while the lower frame is made of industrial nylon plastic. Internal firing components, such as the hammer and sear, utilize steel reinforcements for durability. The video demonstrates the field stripping process, showing the inner barrel assembly and the hop-up system, which allows for trajectory adjustments using a 3.0mm tool through the front of the guide rod.

Testing and customization options involve the installation of aftermarket parts such as steel guide rods, fiber optic sights, and precision inner barrels. During performance testing, the pistol recorded muzzle velocities ranging from 97 to 105.5 meters per second using standard gas and BBs. The demo ends with the fitment of modular holsters and weapon lights, highlighting the platform's compatibility with various tactical accessories.