Mossberg MMR - Manual (Page 21)

21
Fig. 56
Long and Short Range Apertures: The rear sight has two apertures. The large
aperture is for short range shooting while the small aperture is for long range
shooting. The apertures are changed by pushing the aperture piece forward or
backward.
Coarse adjustment: The rear sight is equipped with a coarse adjustment dial
located beneath the aperture. With the dial all the way down the sights are set for
0-300 meters. With the smaller aperture the sights can be adjusted for 300, 400,
500, 600, or 700 meters using the scale on the coarse adjustment dial.
ADJUSTABLE BUTTSTOCK (OPTIONAL ON TACTICAL MODELS)
Before making any buttstock adjustments, open the action, remove the
magazine and visually and physically inspect the chamber and inside the
receiver to be certain the firearm is unloaded. Rotate the safety selector
lever fully to the “ON” (SAFE) position and keep the muzzle pointed in a
safe direction.
Fig. 57
The adjustable buttstock has 6 positions to adjust length of pull. To adjust length
of pull, squeeze latch and slide buttstock in or out to desired position. Release
latch and push inward on rear of buttstock until the buttstock locks into place.
Tap or push on rear of buttstock to verify buttstock is locked into place.
To avoid damage to the buttstock and to prevent possible personal injury,
before firing live ammunition verify the buttstock is locked into place.
REAR SIGHT APERTURE
WINDAGE KNOB
COARSE
ADJUSTMENT
DIAL
LATCH
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