Please help identify this part

[retep66]

I installed a Magpul forend this morning and found this part on my bench when I was done. My eyesight isn't the best and I almost swept it away. I removed the forend, barrel, and breech bolt. Did not mess with the trigger at all. I figure that someone who knows 870's real we'll could identify. Thanks for your help.

In the photo it is the part above the dime.

[Synchronizor]

It's a magazine cap detent.


These are staked into a hole in the barrel guide ring with a spring underneath, and they help to lock the magazine cap down on 870s that use the old-style external ratchet system.



If your 870 doesn't have the new-style plastic spring retainer and matching cap, you'll want to find the spring and re-stake it and the detent back into the barrel guide ring to keep your cap from backing off.

[retep66]

Thank so much. Would never have thought to look there. Luckily my spring was still in!