Champion practical shooter, Mach Sakai, has tested the Micro Pro Sight on the latest Glock 17 Gen 5 GBB MOS Pistol from Tokyo Marui. The review covers various aspects of the pistol, starting with the presentation of the Glock 17 Gen5 MOS Micro Pro Sight. It includes the installation of the Micro Pro Sight and its adjustment. The review also features live firing of the Glock 17 Gen5 MOS, along with measurements of the initial velocity and firing sound. Sakai further tests the pistol in a Steel Challenge Roundabout and an APS Cup Bullseye. The review also includes a 40m hop adjustment with 0.2g, and the trajectory at 20m, 30m, and 40m with 0.2g. Lastly, Sakai shares his impressions on the newly established air gun chat channel, and discusses his fun interactions with people in Setagaya.