Watch Iraqveteran888 show you how to install a rifle scope base... "In this video Chad takes you along on a bolt action project 'build' with a new Remington 700 AAC-SD. The first task is to install a quality base in order to mount an optic, this video will show how to get your base properly installed for trouble free operation. On custom actions there is an additional option to hard pin the base in place, however there is no easy provision for this on this Remington factory action so it was not covered."