Trijicon 34mm Rifle Scope Colt Knob Mount . It Features Colt-style Thumbscrews Which Easily And Securely Attach To Mil-std-1913 Picatinny Rails. This Mount Is Adjustable For Eye Relief. The Scope Rings Can Be Placed In Four Locations Along The Base. Simply Remove The Base Screws Move The Rings To The Desired Location And Re-install The Mount Screws. Package Contents: Trijicon 34mm Rifle Scope Colt Knob Mount The Trijicon 34mm Rifle Scope Colt Knob Mount is a quality addition to the Trijicon lineup. For more great deals on One Piece Rifle Scope Mounts by Trijicon please browse our Trijicon Riflescopes & Accessories page.