The G49 MOS is essentially a G19 size grip frame with a G17 size slide, taking advantage of the proven carry frame size with a longer barrel and sight radius. This pistol is chambered in 9mm Luger, holds 15+1 rounds in standard magazine capacity, has a 4.49" barrel, Gen 5 characteristics, and the MOS system for mounting optics.
https://www.watertowerdefense.com/in-store/handguns-7188/glock-49-mos-semi-automatic-safe-action-full-size-polymer-frame-pistol-9mm-449-black-dlc-finish-black-interchangeable-backstraps-optics-ready-slide-fixed-sights-15-rounds-3-magazines-4819384