EOTech Mini Red Dot Sight (MRDS) - Manual (Page 24)

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d. Assume a good firing position and align the MRDS red dot with the center of the
target.
e. Fire a 3-round shot group and note the center of the shot group relative to the
center of the target.
f. Rotate the boresight adjusters to move the center of the shot group to the center of
the target.
g. Fire another 3-round shot group and observe the center of the new shot group
relative to the designated strike zone.
h. When 2 out of 3 rounds are in the designated strike zone, the MRDS / weapon
combination is zeroed for that specific range.