How to Reassemble a Mossberg 535


Your Mossberg 535 shotgun lies in front of you in pieces, freshly cleaned and oiled. However, a tough final step remains. The fundamentals of shotgun assembly apply to the Mossberg 535, but as with all guns, there are specifics to reassembly with this particular shotgun. By recognizing the order of assembly and following steps that ensure a proper fit in all aspects of the gun, your Mossberg will be in proper working order in no time.

  • Reassemble the internal receiver components first. According to Mossberg, start by placing the receiver, with safety on, on a flat surface with the trigger housing facing upward.

  • Slide the forearm assembly onto the magazine tube, using the action slide bars as a guide. Squeeze these pieces together so that the buttons on the elevator fit the holes in the receiver.

  • With the bolt lock in a downward position, insert into the rear of the bolt assembly. According to Mossberg, the bolt assembly should slide into the receiver if the ejector is depressed.

  • Fit the bolt slide into the cut on the bottom of the bolt lock. Pull the forearm assembly forward while holding down the bolt slide to fit the receiver into the shell of the gun.

  • Put the hammer in a full-cocked position and assemble the trigger housing. Hold the trigger housing assembly in one hand while holding the receiver firmly in the other hand.

  • Locate the lugs on the front of the trigger housing and corresponding slots of the receiver. Ease the trigger assembly rear-first into the receiver.

  • Line up the pin holes in the trigger assembly with the holes in the receiver. Insert the housing pin by pushing it in fully so it is flush on both sides of the receiver. Pump the shotgun a few times to make sure the bolt and receiver are in proper place and that the ejection port easily opens and closes.


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