Game Reaper Mossberg 100ATR and 4 X 4-Medium Mount The Game Reaper One-Piece Scope Mount from DNZ Products is lightweight and rugged, with extreme accuracy. It is also the simplest, easiest scope mount to install in the firearms industry. No Lapping Required Machined from a solid block of 6061T6 aluminum Totally American made and packaged Up to 4-times more thread length-a full 1/2 inch