Remington 870 Super Magnum Problem

Remington 870 Super Magnum Problem

Discussion on Remington 870 Forum:

jobenshain
Hello.
I have a 870 Super Magnum. 5 years ago it jammed and stopped working…while hunting one day. I took it apart once I got out of the field and put it away. Purchased a new 870 and kept hunting…

Now I am trying to get the old one back in working order. I have re-assembled it and it seems to work fine…but it appears there is something missing (see the photo) behind the bolt. There is a gap I dont remember in the past…lol.

I spoke with a local gunsmith and they said its safe to shoot.

Can anyone tell me what…if anything…is missing?

remington_870_super_magnum

Synchronizor

It doesn’t look like anything is missing, but your port cover – the metal piece attached to the rear of your breech bolt – is jammed in the forward position. When the action is closed, the port cover should slide back under spring pressure and cover the rear portion of the enlarged super magnum ejection port.

Remington 870 Super Magnum
Remington 870 Super Magnum

Your port cover may be bent or misaligned, or perhaps its spring is damaged. The gun should be fully functional without the port cover if you end up having to order and wait for replacements, but obviously that opening will let debris or foreign matter fall right into the trigger plate assembly, so I’d stick to fair-weather range shooting until you get the cover fixed.

Vitaly Pedchenko

My name is Vitaly Pedchenko, I started this blog and forum to share information, tips, photos, and advice about the Remington 870 shotgun, accessories, and upgrades. Now I also own AR-15 rifle and MP5 pistol caliber carbine. I am firearms instructor, competitive shooter and IPSC Range Officer. I participate in practical shooting and 3-Gun competitions because they are the best way for me to test equipment and upgrades under stress. I am member of the PRACTICA shooting club. I also participate in REAGO, which provides Tactical Combat Casualty Care training. The main purpose of the Rem870.com blog and forum is to have a compilation of information about the Remington 870 shotgun in one organized, accessible place.

7 thoughts on “Remington 870 Super Magnum Problem

  • 24.01.2017 at 03:04
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    ive noticed that he has a scratch on his port cover, i also have one in the exact same position after realizing my port cover was dislodged and fell into the receiver. what is the meaning of this scratch? ive notice my port cover is disfigured slightly too and may the source of both of our malfunctions. if anyone knows answers to both of my questions write to kayy_pizz@gmail.com

    Reply
  • 26.09.2017 at 20:35
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    How did my barrel get twisted between the chamber and the ring that mounts it to the magazine, with minimal firing

    Reply
  • 22.10.2017 at 17:29
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    Your hammer is locked forward by the bold. Slide it forward with your finger or screwdriver and let the hammer fall back then re-cock it. Load it up and have fun… ps . Don’t dry fire it when u take it apart .

    Reply
  • 15.12.2020 at 22:55
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    This post really helped me. My 870 Super mag jammed while I was wade hunting and I took it apart and the breech assembly fell in the water. I retrieved it and put it back together but it didn’t look right. I took it to a big firearms dealer and the gunsmith looked at it and said that a cover looked missing. After reading this post I realized the port cover just needed to be pushed back with my finger because it was stuck. What a relief that I’m not missing a part! I’m surprised the gunsmith didn’t know that. It’s amazing what you can find on the internet. You guys really helped. Thanks!

    Reply

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