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Angle cosine indicator Mil Spec

Angle cosine indicator Mil Spec

Price: £220.00 Inc VAT

Availability: Pre-order 3-5 days
Product Code: ACIMIL


The Angle Cosine Indicator (ACI) is an indispensable tool for long distance precision shots when aiming up or downhill. The ACI helps you to easily calculate and correct the gravity’s effect on your bullet’s trajectory.


  • Mil-spec version
  • NSN 1005 01 560 0130
  • Waterproof
  • Aircraft grade aluminium construction
  • Hard coat anodised black finish
  • Co-Sine numbers laser engraved in five (5) degree increments
  • Lens is shatter proof, shock proof and resistant to chemicals such as acetone and cleaning solvents.

How to use the ACI:

  • Measure the distance to target by your rangefinder or your scope’s reticle
  • Aim at the target and read the number shown on the Angle Cosine Indicator
  • Multiply the actual distance by the shown cosine number to get the adjusted distance for gravity.


  • Measured target distance: 800 m
  • Cosine number shown on ACI while aiming at target: 0.87.
  • Adjusted distance to target: 800 x 0.87 = 696 m

Unless otherwise stated the price is for a single item, in one colour.

Parabellum Consulting Limited accepts no liability for the use (or misuse) of this equipment.

Pictures are for reference; product delivered may differ slightly to that shown.

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