Mossberg 500, 835, 590 Pump Action Shotgun Instructions Manual

IMPORTANT “SAFETY WARNINGS” - NOTE THE SYMBOL
These safety warnings are for your protection as well as the safety of others. Disregarding
information in this manual may result in serious injury or death.
Be certain this owner’s manual is available for reference and is kept with this
firearm if transferred to another party. If manual is lost or misplaced, write
directly to Mossberg for a free replacement copy.
After performing any work on your firearm such as cleaning, adjustments,
disassembly or...

As the owner of a firearm, you must undertake the full-time responsibility of
safe firearms handling for your own safety and the safety of those around you:
•  Keep all firearms and ammunition out of the reach of children.
• Store your firearms and ammunition separately.
•  Never store a loaded firearm.
•  Never leave a loaded firearm unattended.
•  Never transport a loaded firearm in a vehicle.
•  Unload your rifle when you have stopped shooting and when you have to
  climb a tree, fence, cross a...

TABLE OF CONTENTS
Page
Operating Instructions............................................................................................  2
Mechanical Safety ...............................................................................................  2
Barrel Assembly ..................................................................................................   3,4
Magazine Capacity ..............................................................................................  4
Loading...

2
OPERATING INSTRUCTIONS
Read and understand this entire manual and its safety warnings before firing the shotgun.
Remember, a firearm’s manual safety is a mechanical device which can never
replace safe gun handling practices.
Never rely on any mechanical safety device to prevent the dangers of careless
handling or pointing a firearm in an unsafe direaction.
MECHANICAL SAFETY
The safety is located on  the top rear portion of the receiver (Fig. 2) and must be manually
moved to the desired position by the...

3
BARREL ASSEMBLY
Barrels are not interchangeable between model numbers, gauge or capacity.
500, 835 and 590 barrels are interchangeable only with barrels of the same model,
gauge and capacity.
CAUTION: Never close the action or pull trigger while barrel is removed as damage
could result to the firearm.
To facilitate shipping, some models are packaged with the barrel removed. To install the
barrel in the receiver, proceed as follows:
Visually inspect the inside of the barrel to make certain it is free of...

4
Caution:The magazine spring exerts pressure on the retainer. Use caution when
disassembling.
To disassemble: Pry up at various points around the small hole in the
center of the magazine spring retainer. Cup hand over retainer and
magazine so as to keep spring and retainer confined. Use caution not
to bend or distort the magazine tube end and or threads.
500
® Models:Slide the barrel into the receiver and tighten the takedown screw, finger
tight only. DO NOT use pliers or a wrench to tighten the...

THE SHOTGUN IS NOW  LOADED! The safety button should be fully rearward in the
“ON” (SAFE) position until ready to use. Keep the muzzle pointed in a safe direction at
all times.
LOADING MAGAZINE
Load the magazine tube by turning the shotgun so that the trigger guard is facing up and the
action is closed. Push the front end of the shell into the magazine tube until the rim of the shell
snaps past the cartridge stop (Fig. 6 & 9). Never attempt to exceed the magazine capacity.
5
Inspect the chamber and bore...

6
FIRING
Discharging firearms in poorly ventilated areas, cleaning firearms, or handling
ammunition may result in exposure to lead and other substances known to cause
birth defects, reproductive harm, and other serious physical injury. Have adequate
ventilation at all times. Wash hands thoroughly after exposure.
With the shotgun pointed in a safe direction and held in the proper firing position, move the
safety forward to its “OFF” (FIRE) position. Pulling the trigger through its full travel to the rear,...

7
Continue pulling the forearm rearward to release the next shotshell onto the elevator.
Turn the shotgun so that the ejection port faces downward to allow the released shotshell to drop
out through the ejection port.
Push the forearm completely forward, closing the bolt without a shell being chambered.
Turn the shotgun over so that the trigger guard is positioned upward and the gun
remains pointed in a safe direction.
Insert your right thumb into the opening in the bottom of the receiver and depress the...

8
Remove the barrel from the receiver with a gentle back-and-forth rotational
movement while pulling the barrel out of the receiver assembly.
TRIGGER HOUSING REMOVAL
Position the shotgun on a clean surface with the trigger guard upward. With a blunt object (no
greater than 3/16 [4.76 mm] diameter), push out the small diameter trigger housing retainer pin
located on the side of the receiver, approximately a 1/2 (12.7 mm) below the rear of the trigger
guard (Fig. 8).
Remove the trigger housing assembly by...