Operating and Safety Manual

ZEROING YOUR SIGHTS…
19
Follow the steps below to establish a Zero at 25 meters. Your MBUS Type Rifle Sights
will then be set with a 300-meter battlesight zero. With this procedure, only the
Front Sight Post and Rear Sight Windage Knob are adjusted so that you can hit your
Point of Aim at 300 meters.
25 METER ZEROING PROCEDURES…
1. Place an appropriate 25 Meter Paper Sighting Target 25 meters downrange and follow
the steps below to establish a “battlesight” zero. Do not move the Front Sight Post at
this time. It was set at the factory and should be very close to “Zero”.
(Bushmaster Sighting-In Targets, Part# QP-015K - see Bushmaster Catalog or Website)
2. The smaller (unmarked) Rear Sight Aperture should be in the UP position. Center
the Rear Sight by turning the Windage Knob left or right. This creates what is called
“Mechanical Zero Windage”.
3. Check that your field of fire is clear, and that it is safe to shoot. Carefully aim and fire
a group of three shots at the center of the target bullseye.
4. Inspect your target - if your shot group is not in the center of the bullseye, the squares
on the target sheet will help you calculate the required “clicks” necessary to move
your next shot group toward the bullseye.
(Remember! - any changes in elevation are to be made by moving the front sight post)