The selection between the {Glock 19X MOS and the G19 can be difficult for potential Glock owners . The MOS variant offers a built-in optics capable slide, eliminating the necessity for a third-party adapter. https://glock-19x-mos278566.blognody.com/52685718/selecting-the-best-glock-19x-mos-vs-g19-which-firearm-is-suitable-for-the-user