These instructions break the shotgun down into 10 parts. Move your cursor over the parts on image of the disassembled shotgun to see the names of the parts.
Note: You should be familiar with the operations of the shotgun (i.e. Loading and unloading) before undertaking this task.
Step 1: Clear the Shotgun
1. Make sure the safety is on (safety button pushed reward with no red dot showing)
2. Check the magazine tube to ensure it is clear of any shells
3. Open the Action
a. Depress action lock lever
b. Pull rearward on the forearm
4. Check the chamber area to ensure it is clear of any shells
The shotgun is now clear and it is safe to begin disassembly.
Step 2: Remove the Barrel
2. Unscrew (counter-clockwise) the takedown screw
3. Pull forward on the barrel
Note: The Mossberg 500 comes with interchangeable barrels allowing the operator to switch to a barrel that better suits their intended uses. To change barrels simply remove the barrel that is to be changed and attach the desired barrel.
Danger: Barrels of different models and calibers should not be interchanged. This can cause serious malfunctions in the firearm’s operation endangering the operator and those nearby.
Step 3: Remove the Trigger Group
1. Push the trigger housing pin completely out of the shotgun
2. Pull down on the rear of the trigger guard
Caution: Do not pull the trigger when the trigger assembly is out of the shotgun because it may damage the part.
Caution: The Trigger housing pin is very small and has a tendency to roll. Put it in a place where you can easily keep track of it so it does not become lost.
Step 4: Remove the Cartridge Stop and the Cartridge Interrupter
Pull the cartridge interrupter and cartridge stop out of the receiver.
Note: The cartridge interrupter and cartridge stop fit only in their intended side so keeping track of which piece came from which side in not necessary.
Step 5: Remove the Bolt Slide
Tip: If the forearm has not been moved the bolt slide should be lined up correctly for easy removal.
Tip: If the bolt slide does not come out easily then use the forearm to position the bolt slide directly below the relief cuts in the receiver (about halfway back).
Step 6: Remove the Forearm
Step 7: Remove the Bolt
Step 8: Remove the Elevator
2. Squeeze the arms together and pull forward out of the bottom of the receiver
Tip: The safety on the receive must be in the safe position to remove the cartridge elevator.