PRO DNA Silencio Full Barrel Kit - Cocker ThreadThe PRO DNA SILENCIO BARREL KIT is incredibly versatile and is the most advanced Infamous barrel system to date. The kit is electro polished and it has 6 pieces featuring a Silencio tip with four solid 8" barrel backs in even numbered bore sizes to best suit the players needs (680, . 683, . 686, . 688). In addition to all the above, the kit also includes a matching barrel back that accepts XL barrel inserts. Giving the player the option to use either