This is a factory Thompson Center Contender and G2 Contender Barrel. Barrels for the Contender and G2 Contender are interchangeable, but not for use with Encore frames. They can be changed in seconds by removing the forend and tapping out the barrel/frame hinge pin. Drilled and tapped for scope mounts. No gunsmithing required. This barrel will not work on Contender frames with a serial number pre 195,000 unless the grips have been changed to the new G2 style.
It is possible to purchase the T/C® Encore and Contender in a rifle or pistol configuration. Since this is the case, it shall be the responsibility of the consumer to comply with all Federal, State, and Local Laws regarding barrel length and configurations.
It is a violation of Federal Law to use handgun parts, including barrel and/or pistol grip, on an Encore/Contender originally sold as a rifle
For more information, see: The Gun Control Act of 1968 U.S.C. Title 18, Chapter 44 on the ATF web site