ACI Flatline Ops Angle Cosine Indicator "Mil Spec" Version (Water Proof)

The Flatline Ops Military Spec Angle Cosine Indicator® (ACI®) mounts to either our STRONG ARM™ or SLOT LOCK™ adapter and takes the guesswork out of uphill and downhill precision, long-range shooting. An angle cosine indicator is a simple tool for hunters to use in mountainous terrain to obtain their distance to target, corrected for gravity.

Solid, Durable Construction

Based on the principles of our ADI, this version of the ACI is guaranteed watertight and is manufactured per US Military Directives. The ACI is a vault-solid, precision instrument, silent (per military specs), and constructed from aircraft grade aluminum, which is anodized in a flat black color. Cosine numbers are laser-engraved onto the body in five degree increments, and the lens is shatterproof, shockproof, and resistant to chemicals such as acetone and cleaning solvents. Completely mechanical, there are no batteries or electronics to fail.

**Are you a left handed shooter? Please contact us to special order our left handed ACI.

* Return Policy

Flatline Ops warrants all products for 1 year from the date of purchase against manufacturing defects. Proof of purchase is required (sales receipt) when making a warranty claim.

Flatline Ops at their discretion, will repair or replace any part or parts of the product determined to be defective and will do so at Flatline Ops’ expense. Contact Flatline Ops with warranty questions or claims.