Midwest Industries, Chassis, Aluminum, Fits Ruger PC Carbine, Accepts Mil-Spec Collapsible Stock (Stock Not Included), Black Anodized Finish This Midwest Industries Ruger PC Carbine Chassis System retrofits the PC Carbine for compatibility with AR-15 pistol grips and collapsible buttstock assemblies. The all aluminum chassis maintains the PC Carbine's easy-change magazine well feature, is designed to allow use of the original factory iron sights and includes a mil-spec diameter, 6-position buffer tube with an internal waterproof compartment. All tools and mounting hardware are included. This chassis is only compatible with Ruger PC 9mm and 40 S&W takedown models. May not be compatible with AR-15 pistol grips that have a beavertail backstrap. Midwest Industries is a proven leader in the firearm industry. Made in America, focusing on the small details to make your rifle platform better.