Adjustable Tension V-Block for Ruger 10/22Solves the Problem of Barrel Sag or Droop with Custom Tension  Tactical Innovations Adjustable V-Block allows you to get a perfect answer to the particular barrel "droop" characteristics of your personal...

  Barrel droop or barrel sag is a consideration when you're seeking optimum accuracy and scope alignment with the Ruger 10/22. The standard slip-fit of the barrel to the receiver can be drawn or pulled downward as it is tighten onto the receiver...