Rotating Barricade Stop Features Use this quick disconnect rotating barricade stop on your MPA BA Chassis or Rifle with 1/4a ^2 drilled and reamed holes on fore end for a rock solid setup on a variety of barricades. This is an outstanding accessory for your BA system to provide a significant competitive advantage during PRS and similar Long Range Tactical Rifle competitions. If you have an older BA Rifle or Chassis with only drilled and tapped holes on the bottom of the fore end and want to utilize this system contact customer service at MPA to have your chassis sent back in for the necessary modifications. Rotating Barricade Stop Specifications Used with long range PRs for BA chassis