This only fits "Standard" Rail mounts sizes. It's Great mount for Hunters that would like to use their phone to record video, or view maps on screen, or other hunting related apps. Some mounts cover the screen, this one keeps it open so you can still use the touch screen. Now you can easily mount your phone to your equipment so you can capture amazing action video of all your outdoor adventures. This unique mount includes a twist lock at the back side so you can be sure your device won't come out, if you don't want it to. Get a solid grip on your phone while using this clamp with any other accessories you may already own. Why risk dropping your phone while hunting or target practicing? Action Mount is a USA based company that manufactures innovative smartphone accessories so you can use the device you already own to record the moments in your life that matter most. Action Mount: Shoot. Edit. Share.