Newbie. Where do these parts go??? HELP PLEASE

[amccullough90]

Was stripping my M&P 10 and was removing the bolt when these parts came falling out. Any clue where they go??? It's the little metal piece and spring. Thanks!

 

[torizus]

The pin (part#108) goes in front of the threaded ring on your lower reciever, the spring (part#109) goes in the hole first. The pin retains the buffer inside the buffer tube .

The pin goes with the wider end down on top of the spring. After you load the recoil spring into the tube, you then place the buffer into the tube while depressing he nib down on part #108 andreleleasing it once the buffer is in and under spring pressure. The small spring,part#109 will push up part #108 and the nib on this part holds the buffer in place.

 

[MistWolf]

It's the buffer retainer pin & spring. The assembly is to keep the buffer & action spring from shooting out when the upper is separated from the lower. Normally, the pin & spring is retained by the receiver extension. If the assembly has popped out, you have a problem with the RE. It's either loose, not installed correctly or the lip that is to hold the pin in place is out of spec

 

[sgtsandman]

I agree, that pin and spring should not have popped out on it's own. I would get it looked at either by a gunsmith or Smith & Wesson. The gunsmith will probably be quicker but Smith & Wesson will more than likely be free under warranty. Unless you've done upgrades to the rifle.

 

[Palmetto-Pride]

I agree, that pin and spring should not have popped out on it's own. I would get it looked at either by a gunsmith or Smith & Wesson. The gunsmith will probably be quicker but Smith & Wesson will more than likely be free under warranty. Unless you've done upgrades to the rifle.

Good lord you don't need to send the whole rifle back for that minor simple problem to fix. My guess would be that the buffer tube just needs to be threaded into the receiver a little bit more. Loosen the castle not on the buffer tube and very carefully while the pin and spring are below the surface turn the buffer tube one more turn into the receiver that should be enough to capture the pin and not let it come out. You can use an AR 15 armors wrench they are usually no more than about $20 from any local gun store. Or you can use a pair of channel locks and use a piece of leather between the channel locks and the Castle nut to keep it from scarring. It amazes me the simple stuff people tell other people to send there rifles back for.

 

[sgtsandman]

Not everyone is mechanically inclined, so I shy away from recommending self repairs.

 

[bergermeister]

Not everyone is mechanically inclined, so I shy away from recommending self repairs.

Probably a good call on this one-