This Mount is Designed to fit a Mil spec M1913 (Picatinny) Optic mounting rail.
Note: The Scope MUST be removed to install the Indicator mount.
1. Slide the Angle Cosine Indicator (ACI) into the Angle Cosine Rail Mount (ACRM) using the #4-40 Cap Screw insert the screw into the mount and sung.
2. Making note of the location of the scope rings, slip the mount onto the optic rail.
3. Re-install the scope per manufactors instructions, move the ACRM to the desired location and install the 2 #8-32 soft point set screws.
4. Make sure you can operate the scope and view the Indicator.
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