Badger Ordnance Angle Cosine Indicator Mount Gen l fits the Sniper Tool Designs ACI NSN 1005-01-584-5408. The Gen II ACI Rail Mount is compatible with all M1913 MIL STD mounts and attaches with 2 soft point set screws to prevent marring of the rail. NOTE: Includes Gen I Mount only. For the Gen I Mount/ACI Kit use P/N 306-37A. Specifications for Badger Ordnance Angle Cosine Indicator Mount Gen I: Manufacturer: Badger Ordnance Color: Black Fit: Sniper Tool Designs ACI Additional Features: Gen I Package Contents: Badger Ordnance Angle Cosine Indicator Mount Gen I Badger Ordnance 306-37: Angle Cosine Indicator Mount Gen l fits the Sniper Tool Designs ACI NSN 1005-01-584-5408