The whiz wheel unit consists of a generic sleeve with interchangeable wheels that correspond to. different weapon and ammunition types. The specific variables that a wheel is built for are: The G7 BC. of the bullet, nominal muzzle velocity, sight height, and either MILS/Meters or MOA/Yards units.
Great question! A physician who is a DO (Doctor of Osteopathic Medicine) is held to the same standards as an MD. They both attend four years of medical school and complete their training during the same residency programs.
Needless to say, it takes perserverence, intelligence, compassion, dedication, high energy, and commitment (among other things) to become a doctor. Medical school is four years, followed by one year of internship, two year residency, and that's just to become a generalized medical doctor. Specialists continue their course of studies for an additional four to eight years beyond residency.