Mesa Tactical’s LEO Telescoping Recoil Stock Kit for Mossberg 500/590 is the perfect kit for anyone looking to convert their 12-gauge shotgun to accept AR-15 parts and accessories. This adapter provides you with the ability to utilize AR-15 pistol grips” carbine receiver extensions and stocks. The LEO adapter will provide you with an optimal stock elevation allowing the use of iron sights or bead sights. The adapter also features a quick detach sling swivel socket and is made from high quality” precision” CNC machined aluminum. This kit also includes the Hydraulic recoil buffer designed to eat up the recoil on your defensive shotgun. The adapter is easy to install and does not require a gunsmith to install.