Instruction Manual

By following the steps below to establish a Zero at 25 meters, your Bushmaster

M16A2 Type Rifle Sights will be set with a 300-meter battlesight. 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.

Smaller Aperture Flipped UP

Rear Sight Elevation Dial

set at 300 Meter Mark

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”. (Note: factory height setting is 5mm from “floor” of Front Sight Base to top of Front Sight Post).

The smaller (unmarked) Rear Sight Aperture should be in the UP position. Center the Rear Sight by turning

the Windage Knob left or right (the markings on back edge of the Rear Sight Base will help you). This

creates what is called “Mechanical Zero Windage”.

3. Lower the Rear Sight all the way down by rotating the Elevation Dial counterclockwise. Then rotate the

elevation dial (clockwise) “UP” one click PAST the 300 Meter Mark (the mark above the 8/3 on the top of

the Elevation Knob should align with the corresponding mark on the left side of the Upper Receiver). From

this point on, the Elevation Knob should not be moved. Any changes in elevation required in the following

zeroing steps will be made by raising or lowering the Front Sight Post only.

NOTE:

The A3 (Removable Carry Handle) Type Rifle Rear Sight differs in that its Elevation Index is marked

6/3 instead of 8/3. The vertical Elevation shaft of the A3 Sight is shorter - with finer thread pitch - giving it

1/2 Minute of Adjustment clicks instead of the 1 Minute of Adjustments of the A2 Sight. The A3 Elevation

Dial must be moved 2 clicks up to the “Z” (Zero) mark. Otherwise, the Windage Components and Flip-up

Aperture - and their operation - are the same as on the A2 Rear Sight.

25 METER ZEROING PROCEDURES… 25 METER ZEROING PROCEDURES…

For M16A2 Type Iron Rifle Sights

Pg. 19

ZEROING YOUR SIGHTS…ZEROING YOUR SIGHTS…

25 METER ZEROING PROCEDURES…

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