The Talley 1-piece Picatinny Base is constructed of aluminum and includes mounting hardware. The rail allows the user to decide where their scope will be mounted since there are numerous slots, and it will accept Picatinny and most Weaver-style rings. This base is available in a 20 MOA cant for extended range shooting. Savage Accutrigger actions have both 6-48 and 8-40 depending upon the actual model. All new Savage center fire rifles that have a serial number beginning with “P” require 8-40 screws. Savage Ultralight and Timberline centerfire models require 8-40 screws.