U.S. Tactical Supply Inc. - https://goo.gl/29u3bD The Mildot Master is an analog calculator designed along the principle of a slide rule, utilizing logarithmic and inverse logarithmic scales developed specifically for performing sniper
Mildot Master : Amazon.ca: Sports & Outdoors
Mildot Master: Simplifying Your Precision Shooting Solution
Mildot Master – MP-SEC
Mildot Master: Simplifying Your Precision Shooting Solution
Mildot Master....using it with MOA based scopes - YouTube