Make sure all parts are included. You should have:
An optics mount
4x mount mounting screws (flat head, torx drive screws)
Make sure the rifle is unloaded and safe, then remove the rear sight.
Install the optics mount onto the rifle, using the included torx head screws. Do not exceed 8 in-lbs! The barrel is tapered, and the mount has a matching tapered profile on the bottom. Make sure the mount is mounted with the correct end forward.
Install the optic onto the mount using the manufacturers instructions
Perform a function check to make sure the rifle is safe and ready to fire.