The Remington model 870 pump action shotgun is a perfect all around shotgun whether for hunting or home defense. It is a reliable, easy to use and affordable shotgun. For many people this is their first shotgun. For those of you who are new to using this shotgun and don't know how to properly maintain it or need a quick reminder on how to assemble/disassemble and don't have time to look up in the manual then this set of instructions is for you.
Time Required: 20-40 Minutes depending on how dirty your weapon is possibly longer
What you will need (See Image 1):
- A flat clean surface to work on
- Your Remington 870
- Clean Rags (Or old T-shirts)
- Bore Snake (12 gage or different for your model)
- CLP (Cleaner, Lubricant, Protectant - Use sparingly, a little bit goes a long way)
Step 1: ENSURE THE WEAPON IS UNLOADED
Always ensure your weapon is unloaded prior to attempting to disassemble your weapon!
With the bolt moved to the rear you can look inside the chamber to ensure that the chamber is clear
Step 2: Unscrew the Magazine Cap
Unscrew this by hand, if you can not do it by hand for some reason place your rag over the cap and gently use a pair of pliers to loosen it. After doing so you will be left with what is shown in image 2
Step 3: Remove the Barrel
After you have unscrewed the magazine cap move the pump-action about halfway back and the barrel will slide right off. After doing this you will be left with what is shown in image 3
Step 4: Remove the Forend, Bolt and Bolt Carrier
Flip the shotgun upside down and use your fingers to push on the spring loaded metal strips located inside the shotgun to flatten them out. This will release the forend, bolt and bolt carrier and you can pull it out just as the barrel was pulled out. You will likely need to press on the strips while pulling the forend. This step is tricky to describe however is easy to complete.
When you have completed this step you will be left with what is shown in image 4
Step 5: Cleaning the Barrel
Spray some CLP into the barrel and feed the bore snake through from the breach end (Image 5). Run your bore snake through your barrel multiple times checking to see if the barrel is clean after each pass (the barrel will appear clear of residue and be shiny). Then spray a corner of your rag with the CLP and wipe down the outside of the barrel.
Step 6: Cleaning the Bolt, Bolt Carrier, the Inside and Outside of Your Shotgun
Spray your bolt and bolt carrier (Image 6) with a light coat of CLP. Use your rag and or Q-Tips to clean the surfaces of these two parts ensuring to get rid of as much carbon build up as possible.
Use the end of your rag with the light coat of CLP to wipe down the inside chamber and outside of your shotgun. You can also use Q-Tips to get those hard to reach areas on the inside.
Step 7: Reassemble the Forend, Bolt and Bolt Carrier
Place the forend back onto the magazine tube, then place the bolt slide and bolt onto the forend as shown in Image 7
Step 8: Reattaching the Forend, Bolt and Bolt Carrier
You will then need to press the spring loaded metal strip again in order to slide the forend back into it's proper position. This can be a bit tricky again but you should get the hang of it quick.
Step 9: Reattach the Barrel and Magazine Cap
With the pump-action about halfway back the barrel will slide back onto the shotgun as simply as you took it off with the pump action about halfway back.
You will now replace the magazine cap and tighten it by hand until you can not tighten it anymore.
DO NOT USE PLIERS! Using pliers to tighten the magazine cap will usually lead to over tightening and can strip the threads of the magazine tube or of the magazine cap.
Step 10: Completion
You are now done Assembling, Cleaning and Disassembling your Remington 870 and it should look just as it did when you started but cleaner.