Tactical rifle/shotgun buttstock cheek rest is made of high quality density durable nylon. The adjustable velcro design makes it easy to attach the cheek rest to the buttstock. It can hold 12 bullets in the slots and can be removed as a whole for easy storage or comfort. It has an zipper bag that can hold items such lens cloth, small tools, survival supplies (small knife, lighter, compass, etc.) or better yet... more bullets. 
Checkout this video for the best way to install this cheek rest on your buttstock:  https://www.youtube.com/watch?v=COoXVpGfXQE&t=621s