MOA is minute of angle, general term alot use when discussing rifle accuracy....roughly 1 inch at 100 yards....2inches at 200 yards ect....if your rifle shoots a 1 inch group at 100 yards its a 1MOA rifle, half inch, its a 1/2MOA rifle ect....minute of milk jug just means yah dont have a problem hitting a milk jug at 100 yards, kind of a ba$tardization of the term....unlike most think this is more than good enough for a short range(out to 100 yards) hunting rifle or a personal defence gun like your carbine.....