Mystery part

[Spad]

When changing the stock some parts fell out. One seems to be a part of the buffer retainer system. Instead of two parts,the spring and post that contacts the buffer my Sporter has another part, a hollow cylinder that the spring fits in and goes down the hole for the buffer retainer spring first. Anyone familiar with this?...A three part buffer retainer...Spad

 

[Foxtrot]

You mean the buffer tube?

 

[Gunslinger808]

Hmm, never heard of that before.
Sounds like yours might have a sleeve that fits into the buffer retainer/spring hole.

 

[Spad]

Gunslinger, That would be a better term. I was re-assembling the rifle having put a new collar buttsock tube lock on when something fell on the floor. Couldn't find anything like it on the diagrams for the AR's. After a lot of looking and fiddeling I saw where the buffer retainer spring fit in this sleeve. So put the sleeve in the hole where the spring went, fits....So I guess this is where it belongs. Can't find a real Smith&Wesson diagram for the rifle, rather disappointed. Maybe someone else out there in S&W land has this same part in their Sporter....Spad

 

[Foxtrot]

Oh I get it now, you mean the spring loaded buffer retaining pin in front of the buffer tube.

 

[Kodiakco]

Sure it's not the rear take down pin spring and detent?

110 & 111

 

[Kodiakco]

Gunslinger, That would be a better term. I was re-assembling the rifle having put a new collar buttsock tube lock on when something fell on the floor. Couldn't find anything like it on the diagrams for the AR's. After a lot of looking and fiddeling I saw where the buffer retainer spring fit in this sleeve. So put the sleeve in the hole where the spring went, fits....So I guess this is where it belongs. Can't find a real Smith&Wesson diagram for the rifle, rather disappointed. Maybe someone else out there in S&W land has this same part in their Sporter....Spad

butt stock tube=receiver extension (buffer tube)

collar butt stock tube lock=castle nut

 

[Spad]

Part #109&109, but I have an extra part.

 

[Spad]

Here is picture of the 3 parts....Trying to figure out what the one in the middle is, has the little tit on the top of the conical shape? The other is the conical sleeve that is obviously the buffer retainer.Little spring onthe topis the takedown spring. Spad

 

[oneyeopn]

That is your buffer retaining pin, you screw your tube in far enough that it holds it in place and keeps it from popping up. It is there to keep your buffer from just sliding out the front of the tube. You should have to depress it to remove your buffer. It is part number 86 in the above diagram.

 

[Gunslinger808]

Yeah, that's certainly different.
In every other case I've seen the buffer retainer pin is large enough that the spring fits INSIDE the pin (hollow bottom), in your case it looks like a sleeve is used to capture both pieces.
If it were my rifle, I'd get the proper sized retainer pin and spring, then do away with the sleeve and out of spec parts.

 

[oneyeopn]

What make of rifle is that. I havent seen the buffer retainer look like that also?

 

[Gunslinger808]

Here's a pic of a "normal" retainer pin/spring:

What make of rifle is that. I havent seen the buffer retainer look like that also?

I know Spike's Tactical was messing around with a captured retainer system like that a while back.

 

[flyer91]

The OP seemed to indicate that this was an M&P Sport in post #4 above. (??)

If so ..... was it purchased used?
Or maybe the latest production units are going to this type of retainer. (??)

In any case ....... your assumptions of how it goes together are exactly what I would think is correct .......

 

[oneyeopn]

I like the spring inside the pin, I really hope that S&W isnt going the other way. I must be getting old and change becomes strange to me LOL

 

[Spad]

The bloody little part doesn't belong to the rifle,belongs to a watch press that I haven't used in years and fell out ofthe box onto the rug under my desk. When taking the AR apart stuff went flying thru the air onto the rug and of course I collected all the parts I could find .....Funny thing the little bugger fit the buffer retainer hole in the rifle. So thanks,sure got a good education on the AR. I apologize...Spad

 

[storeyteller]

Not gon say it could happen to anybody....will say it has happened to me.

 

[Gunslinger808]

When hobbies collide!
Dang it Spad, now you've got a whole bunch of people out there trying to buy up all the pre change buffer retainer lowered out there.

 

[Foxtrot]

Darn it, I was planning on cornering the market on the new high speed low drag buffer retaining assembly too.

 

[flyer91]

Soooooo anyways ........ does the watch use a carbine or rifle buffer?