The Ruger American G2 Arca Rail System is specifically designed for the 2nd. Generation Ruger American rifles. This high quality rail is machined from aircraft grade aluminum and "INSTALLS IN JUST 5 MINUTES" with no need to drill holes or alter your stock in anyway. To promote a highly rigid and seamless fit with your stock, we have engineered a carbon fiber PET saddle which acts as the interface between the stock contours and the rail to ensure a full bearing contact. Along with providing all of the benefits of a full arca mounting platform, this system will "GREATLY" improve stock rigidity and stiffness.  To further expand mounting flexibility, we have included 5 MLock style slots, a short pic rail segment and sling swivel mount. The rail measures 10-inches in length and is coated with a durable and attractive Cerakote finish, The kit includes all mounting hardware.