Make sure all parts are included. You should have the following:
2x mounts, Part A and Part B
4x 6-48 screws (flat head, torx drive screws)
8x M3 allen head screws
Make sure the firearm is unloaded and safe.
Install the Part A half of the mount onto your rifle using the 4 torx head screws. Do not exceed 8 in-lbs! The mount is not symmetric. Part B has an arrow pointing towards the front of the mount. Make sure you install part A the correct way around.
Use 4 of the M3 allen head screws to install your optic on to Part B. Do not exceed 5 in-lbs! Take note that Part B is not symmetric, and can only be installed onto Part A in one direction. Make sure to install your optic the right way around.
Use the remaining 4 M3 allen head screws to install part B onto Part A. Do not exceed 5 in-lbs!
Perform a function check to make sure the firearm is safe to fire.