Delta Wing Reticle is designed for 5.56 calibre by Shooting Enthusiast. It features Three 1 MOA dot surrounded by a tactical equilateral triangle with a trapezoidal exit ( here we call Delta Wing ). The inside length of the equilateral triangle is 20 MOA and the outside length of 25 MOA. Which is designed for target measuring in different angle. The length of the upper side of the trapezoid is 5MOA, and the length of the lower side is 7.3MOA. BDC features with each dot on the vertical line from 100yds, 300yds, 400yds, 500yds, 600yds, 700yds, 800yds. The distance between 2 dots on the side of the equilateral triangle is 15MOA.