What part is this?

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LEVI RUSSELL

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Hey guys, like a total rookie, I have an extra part after field stripping and cleaning a couple guns. Any idea what this is or where it goes? I was working on a Remington 870 and a Beretta PX4. Everything went back together and seems operational, but can't figure out how I left this piece behind.
IMG_20170108_184303884

IMG_20170108_184303884

 
It's obviously a pin of some sort. I'd suggest you take each gun apart and look for a hole with nothing in it. Things may seem to work fine, but then again it's likely supposed to hold something together or in place. And if they decide to move bad things can happen.

Oh, just another suggestion as you weren't clear. Only disassemble one firearm at a time. Had you done that you'd at least know which one to look at.
 
Go to youtube and see if you can find dis-assembly videos for both guns. Do one at a time. Hopefully you'll find it.
 
If you truly just field-stripped the PX4 then there's no way you would have ended up with a piece like that. You'd have had to detail strip it (far beyond field-stripping) to get something like that out of the gun.

So I'm going to guess that it goes to the 870. Maybe the trigger pin?
 
Yep have watched a few breakdown vids of the 870...Even looked at parts schematics. Still not seeing it. Was hoping someone familiar with the gun would recognize it.
 
LEVI RUSSELL said:
Hey guys, like a total rookie, I have an extra part after field stripping and cleaning a couple guns. Any idea what this is or where it goes? I was working on a Remington 870 and a Beretta PX4. Everything went back together and seems operational, but can't figure out how I left this piece behind.
IMG_20170108_184303884

IMG_20170108_184303884

Click to expand...
It's probably an important part.
 
Maybe the lanyard ring pin on the Beretta PX4 ?
Or hammer spring pin ?

s-l1000.jpg
 
It looks like it could be the hammer pin for the PX4, but there are two problems:

1. If the hammer pin for the PX4 wasn't installed, it would be hard to miss. The gun would be nonfunctional in a big way and parts would be loose.
2. Field-stripping the PX4 doesn't involve removing the hammer pin or anything else that looks remotely like the pin in the picture.

It's got to be for the 870 OR maybe it's not for either gun and it's just something that was already sitting on the bench.

If it's for the 870, the logical choices would be either the front or rear trigger plate pins (#66 or #67). Problem with that is that they have very obvious retaining grooves and your pin does not.

It might be the trigger pin for the 870 (#64), but that shouldn't have been removed during a standard disassembly and it is slightly flared on one end so that it doesn't fall out. I don't see the flare in your pic.

https://www.remington.com/sites/def...d M870 Super Mag Owners Manual - 2013-091.pdf

I'm leaning towards it being something that was already on your bench before you started the disassembly.
 
rust collector said:
There are a couple pins in the trigger group. Any marks on the pin for a retainer clip, or dent in the end for a punch?
Click to expand...
No, perfectly smooth, and flat ends. Perfect rod/cylinder shape with no markings...But there are signs of wear, so it seems like a moving piece rather than a holding pin.
 
LEVI RUSSELL said:
No, perfectly smooth, and flat ends. Perfect rod/cylinder shape with no markings...But there are signs of wear, so it seems like a moving piece rather than a holding pin.
Click to expand...
Most pins in firearms have some sort of detent or ridge to help hold them in place when installed. This is why one often needs a punch to get the pin dislodged and then it can be pushed out easily.

I think that it probably was something that you had lying around on your bench. Had you taken anything else apart on that bench recently (even non-firearms)?
 
LEVI RUSSELL

I think that it probably was something that you had lying around on your bench. Had you taken anything else apart on that bench recently (even non-firearms)?
Click to expand...

This is my thought too; that's it's too big for a roll pin for either gun and may have come from something else. Kind of reminds me of some sort pin used in assembling furniture, like a shelf in a cabinet or bookcase.​
 
If you pull the 870 trigger group out of the receiver, is the trigger pivot pin flush with the sides, or is it inset? If the latter, you may have missed the lifter pivot pin and used it for the trigger pivot. The extra part would be the actual trigger pin.
 
With no scale, it is hard to tell, but that looks like a trigger plate pin for an 870, but with no groves. It is possible that someone lost the original and replaced it with that plain pin, but the absence of one of those pins (there are two) should be pretty obvious. If you find that is the case, replace the missing pin with the correct one as soon as possible; that pin has nothing to retain it and it could fall out.

Jim
 
Well the picture is not great on detail, but it looks to me, as it has a couple others, that this would be one of the cross pins that hold the M870 trigger group in place.
 
Good one - came out of a gun you did not mention you worked on ! Happy you got it sorted out.
 
The pin goes to my 10-22, which is very loose and isn't needed for operation as far as I can tell.
Click to expand...
The gun will shoot without it, but it's there to protect the aluminum receiver from bolt impact. Also, I'm not sure what happens if the bolt travels farther back than it normally would with the bolt-stop pin in place.
 
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