I just saw this post, im selling the 6mm proof barrel, the wto means no need for torque tool or taking down the action or removing the stock to pull the barrel, You simply screw it in and take a torx allen head or screwdriver and tighten the lug and go shoot, all my tl3’s have the pins drilled to accept the wto’s, if you travel and hunt it makes life easy, zero is repeatable, never had to re zero, and you can easily pop the wto and use a shouldered pre fit barrel, only you will have to torque them, pm me if you change your mind