To use the ATN NVM-14-3P Night Vision Monocular with the CRYE Precision Nightcap, you would need to attach the included mount to the mounting pad on the Nightcap. The CRYE Precision Nightcap can be used with a variety of different mounts. You would have to place the correct holes in the mounting pad in order to line up to ATN NVM-14-3P Night Vision Monocular mount.