Mossberg 590 - Manual (Page 5)

3
Barrel assemBly
Barrels are not interchangeable between model numbers, gauge or capacity.
500 ® , 505 ™ , 535 ™ , 590 ® and 835 ® barrels are interchangeable only with barrels
of the same model, gauge and capacity.
CAUTION: Never close the action or pull the trigger while the barrel is removed as
damage could result to the firearm.
To facilitate shipping, some models are packaged with the barrel removed. A front swivel
stud and washer are also shipped separately on some models (see items 35 and 36 in
the exploded view). To install the barrel in the receiver, proceed as follows:
Visually and physically inspect the chamber and bore of the barrel to make
certain it is unloaded and that it is free of any obstructions, excessive oil or grease.
If you are unable to remove all obstructions, bring the firearm to a qualified
gunsmith or send it to the authorized Product Service Center. Obstructions of
any kind can cause damage to the firearm and may result in serious personal
injury to the shooter and/or others nearby.
Move the safety button fully rearward to the “ON” (SAFE) position (Fig. 2).
all models: Depress the action lock lever, (Fig. 3) and move the forearm rearward until
the front of the bolt is in the middle of the ejection port (Fig. 7).
CAUTION: Wear eye protection.
590
® /835 ® models: Unscrew the magazine cap by turning it counterclockwise.
Slide the barrel takedown mount ring over the magazine tube while guiding
the barrel extension portion of the barrel into the receiver (Fig. 4).
Gently rotate the barrel back and forth while pushing the barrel into the
receiver.
Slide the barrel into the receiver and tighten the magazine cap, finger
tight only. DO NOT use pliers or a wrench to tighten magazine cap.
If your 590/835 shotgun is equipped with a magazine spring retainer,
prior to putting on the magazine cap, assemble the magazine spring
retainer over the protruding magazine spring. Push the retainer
downward inside magazine tube so that the spring retainer is flush with
the magazine tube end.
TaKeDown screw (500 ® , 505 ™ , 535 ™ )