This sleeve will allow you to use any 7/8 inch paintball barrel with all Opposing Force™ line of suppressors, front sights and hand guards. The 1 inch Paintball Barrel Adapter Sleeve will help fill any gap when using your 7/8 inch barrel on the Opposing Force™ shrouds, helping to maintain the sleek look while also protecting your shroud from getting unneeded dirt and grime inside.