This is NOT a G2 barrel. I do not know if they interchange T/C Contender 35 Remington Barrel 21 long With Sights and scope base. I do not know if the rear sight was relocated as it covers up some of the writing on the barrel. The item “T/C Thompson Center Arms CONTENDER Rifle Barrel 35 Remington 21 Long” is in sale since Thursday, February 22, 2018. This item is in the category “Sporting Goods\Hunting\Gun Parts\Rifle”. The seller is “brokehunter” and is located in Turner, Maine. This item can be shipped to United States.