Mossberg 590 - Manual (Page 15)

IF YOUR FIREARM DOES NOT PERFORM AS DESCRIBED IN ANY OF THE
ABOVE STEPS, CONTACT THE FACTORY AUTHORIZED PRODUCT SERVICE
CENTER IMMEDIATELY. DO NOT ATTEMPT TO USE THE FIREARM.
sighT aDjusTmenTs
BEFORE MAKING ANY SIGHT ADJUSTMENTS:
a. Move the safety button fully rearward to the “ON” (SAFE) position and keep
muzzle pointed in a safe direction.
b. Open the action, visually and physically check chamber, elevator and magazine
tube to be certain the firearm is unloaded.
rifle sighT aDjusTmenTs
13
Depress and hold the action lock lever (Fig. 3). Open and close the action several times to check
for free movement of the action assembly.
Close the action (forearm fully forward) and leave the safety button in the “ON” (SAFE) position.
Pull the trigger rearward fully. The hammer should not fall (No Fire).
Remove your finger from the trigger. Move the safety button to the “OFF” (FIRE) position.The
hammer should not fall (No Fire).
Leave the safety button in the “OFF” (FIRE) position.
Pull the trigger rearward. The hammer should fall (Fire).
Open the action by moving the forearm fully rearward. Move the safety button fully rearward to
the “ON” (SAFE) position.
funcTion TesTing
After performing any work on your firearm such as cleaning, disassembly or
installation of any accessory, check your firearm for proper functioning before
firing any live ammunition.
a. Move the safety button fully rearward to the “ON” (SAFE) position and keep
muzzle pointed in a safe direction.
b. Open the action, visually and physically check chamber, elevator and magazine
tube to be certain the firearm is unloaded.
williams style rear sight:
Elevation may be adjusted by loosening the side screw on the rear sight leaf base. This will allow
the sight leaf base to be raised or lowered by sliding the base up or down the rear sight ramp.
Tighten screw after adjustment.
Windage may be adjusted by loosening the top screw and sliding the sight leaf left or right in the
sight leaf base. Tighten screw after adjustment.
Remember: Move the rear sight in the same direction you would like the shot to move. For
example, if the point of impact is low and left of the point of aim, move the rear sight upward and
to the right.