The Origin Medium Action comes with:

• Floating bolt head
• Interchangeable bolt head so you can run multiple calibers in one action
• Pinned recoil lug
• Controlled round feed
• Mechanical ejector
• Adjustable firing pin protrusion
• Machined from 416 stainless
• Nitride finish
• Medium actions will NOT work with standard Remington 700 short or long action stocks or chassis, you will need a medium length stock or chassis
• Medium actions will NOT work with Short or long action AICS magazines. You can use MDT XM mags.
• Medium actions will NOT work with Remington 700 short or long action BDL/hinged floor plate. You can only use the Wyatts Short action mid length kit
• Medium actions will NOT work with Remington 700 short or long action bottom metal.  You can use Hawkins M5 DBM, Hawkins Precision M5 Oberndorf, or Hawkins Hunter DBM
• Accepts Savage small shank barrels (1-1/16″ x 20 TPI) or our shouldered prefit barrels

Along with picking your Zermatt Arms/Bighorn Arms action, you will need to choose which bolt head, rail, and bolt knob you would like for your action.