Angle Cosine Indicator Angle Cosine Indicator Now Milspec and Waterproof
Sniper Tools Design Co. NSN: 1005 99 212 5621

SOLID, RELIABLE, DEPENDABLE, DURABLE, AND THE #1 CHOICE OF MILITARY & L.E. SNIPERS FOR ANGLE FIRE SOLUTIONS.

NOTE -- Mount not included --

The 'Angle Cosine Indicator', is a simple tool for hunters in mountainous terrain. It is a vault solid precision instrument, quiet and made from aircraft grade aluminum, which is anodized black. The A.C.I. is completely compatible with the 'Mil-Dot Master' and ballistic software, as the cosine numbers are in five (5) degree increments.
The 'A.C.I.' works on any shoulder mounted weapon system and on just about any optics. When the weapon is held at an angle, the 'A.C.I.' indicates the cosign number of that angle by means of a highly visible index mark. The cosign number is then multiplied to the 'Established Range', (straight line distance to target) which gives you the corrected for gravity distance.

There are several ways to mount the device. One way is to utilize a short, Weaver Base scope ring, which is mounted onto the scope tube, at 90 degrees.

How does it work? Simple...

1. Determine full line-of-sight distance to target.

2. Determine the 'angle cosine' by aiming at the target, then looking at the indicator on the ACI.

3. Multiply the full line-of-sight distance to target by the angle cosine number to determine the corrected for gravity distance.

4. Adjust the sight elevation knob (come-ups) on your scope, for the 'corrected range'.