Cleaning And Lubrication

With proper care, your Mossberg shotgun will provide you with years of dependable sen ice Your firearm should be inspected and cleaned periodically to insure that it remains in good condition. Clean your firearm as soon as possible after use. This is especially important if your firearm has been exposed to moisture. Use the instructions and equipment provided in a quality gun cleaning kit. For maximum performance and continued satisfaction with your shotgun, periodic cleaning and lubrication...

Make absolutely certain your gun is unloaded Do not send ammunition with your gun

Remove all accessories from your firearm such as scopes, slings, swivels, mounts, etc. Please package the gun securely (be certain gun parts cannot shift during shipment) in a suitable shipping container and ship the gun via UPS or your chosen carrier, prepaid and insured to Mossberg Service Center 101 Powdered Metal Drive North Haven, CT 06473 Attn Service Dept Include with your firearm a clear description of the problem and service you wish for us to perform. Please give us a clear ship-to...

Action Release Control

The action lock lever is located on the left side of the trigger housing just rearward of the trigger guard. The action lock lever allows the action to be unlocked and opened for inspection or unloading without pulling the trigger. The action may be opened by depressing the lever and pulling the forearm rearward Fig. 3 . NOTE During firing, the action unlocks automatically after the hammer falls and the action can be cycled without depressing the action lock lever. Model 590DA1 barrels are not...

Heat Shield Installation

NOTE The heat shield can only be installed on 12 ga plain barrel models. Heat shields will not fit on barrels with Ghost Ring sights, 1 Follow barrel removal procedures as described in this Owner's Manual 2 Carefully remove front sight by turning it counterclockwise. Take precautions to insure you do not damage the barrel finish. 3 Slide heat shield onto barrel from muzzle end. Large ring on heat shield is positioned towards rear of barrel. 4 With the heat shield on the barrel, use a small...

Assembly Of Internal Receiver Components

Place the receiver with the trigger housing opening upward on a clean surface. Check to be certain that the safety button on the top rear of the receiver is fully rearward in the ON SAFE position Fig. 2 . Slide the forearm assembly onto the magazine tube while guiding the action slide bars into the corresponding cuts in the front of the receiver Fig. 12 . Assemble the elevator by squeezing the arms together sufficiently to position them in the receiver so that the buttons on the elevator fit...

Loading

Bolt Action Receiver Blueprints

Before loading, move the safety button fully rearward Fig. 2 to the ON SAFE position. During loading never allow fingers or any objects to contact the trigger. Keep the muzzle pointed in a safe direction at all times. Depress the action lock ever Fig. 3 and open the action by pulling the forearm completely rearward. Inspect the chamber and bore of the barrel for any obstruction, excessive oil or grease. The chamber is the rear portion of the barrel which contains the cartridge Fig. 4 . Failure...

Ghost Ring Sight Adjustments

Ghost Ring Mossberg Rotate

ROTATE ELEVATION RING FOR ELEVATION ADJUSTMENT ROTATE ELEVATION RING FOR ELEVATION ADJUSTMENT Model 590DA1 barrels are not interchangeable with model 500 or 835 barrels. Interchangeable barrels are available within 590 models, by shot capacity only. before performing any disassembly or assembly procedure a Move the safety button fully rearward to the ON SAFE position and keep muzzle pointed in a safe direction. b. Open the action, check chamber, elevator and magazine tube to be certain firearm...