Co-witnessing uses one sight system to zero or confirm zero of another sight system. In this tip, we are using back-up iron sights to co-witness an optic device because optic devices are susceptible to damage or failure.

Co-witnessing a HIVIZ AR-15 front sight makes it viable to switch an optic device between rifles or for confirming zero if the optic has been removed or suffered damage. First, ensure zero of the HIVIZ front/peep rear sights (1) at the desired range (usually zeroed at 25 yards and confirmed at 100 yards). Next, install the optic device and view the dot through the peep sight with the HIVIZ sight centered as if shooting (2). Adjust the optic device until the dot is superimposed or forms a figure 8 on the HIVIZ front sight (3).

Take your first shot using the optic device. Raise your head until the dot appears in the center of the optic (4). Test fire to confirm point-of-impact at 100 yards and make any minor adjustments as necessary.

NOTE: This technique will not work with higher mounts or magnified optic devices such as the ACOG sight or conventional riflescopes.