Get another good look at the Umarex Steel Glock GBB Series made by Star Rainbow Company (SRC) in this video by Bang Bang Airsoft Shop. The SRC Steel Glock Gen 5 MOS series, which includes the Glock 17 and Glock 19, are officially licensed by Umarex and Glock and feature realistic markings and dimensions. They show in the video, the full steel parts, including a steel slide and hammer group, and their performance with both gas and CO2 magazines for strong recoil. These models are MOS (Modular Optic System) ready out of the box with adapter plates for various sights, and the reviewer highly recommends them for their reliable performance, especially when using CO2.