Shooting the Glock 43X I can even now get a good significant grip on the gun and increase Regulate. As well as, that large grip fills my arms correctly! Modular optic system - MOS The G43X MOS features slide cuts made for precise micro-optics. The modular optic procedure (MOS) configuration https://glock43xsupply.us/product/glock-43x-for-sale/