Wondering what is SUB MOA? Here’s an explanation:
‘MOA’, or Minute of Angle, in relation to firearm accuracy refers to the capability that a firearm has to consistently deliver a grouping of shots at a particular distance. For example: One MOA = at 100 yards is a 1” group. One MOA at 200 yards is a 2” group, at 300 yards a 3” group, etc.
Sub-MOA refers to, a single group of shots or an average of several groups, that will measure less than one MOA between the two furthest shots in the group, meaning all shots fall under a one MOA.
Source: What is Sub MOA Accuracy, and Why is it Important When Choosing a Rifle?