Glider
Captain
It's instead of Minute Of Angle, or MOA, the usual way to measure the accuracy of a weapon. If it shoots sub MOA it's extremely accurate, and if it shoots above 3 MOA not soo accurate.
1 MOA is approx. one inch at 100y, that means if your rifle shoots 1 MOA groups it will place all its projectiles within a one inch circle at 100y, and if it shoots .5 MOA half that.
Thanks
MOA I know well, MOB was a new version to me.