Well, I went for it....So far it works GREAT!!

Jav said:
Ohhh, okay. Thought you were here already. Would be cool to shoot with a S&W forum member!
Click to expand...

Oh definitely! I'll let you know. For a second there, I thought you were going to tell me what I did is illegal in CA. Haha
 
Okay I managed to sneak out quick and put around 150 rounds through the gun. I am happy to report that so far the gun works FLAWLESSLY!
No degrading of accuracy, no malfunctions of any kind. After I finished shooting I broke the gun down and inspected the bolt, inside of the upper and of course the lower. All normal. no indication of wearing or stresses.

The only difference that stood out to me, and I'm not sure if this is of any consequence, but it did seem that you felt the recoil differently. I didn't hear the "sproing" sound you get with a real AR from the buffer spring and tube, but there was a kind of knock or clunk as though the buffer does move slightly or something. Could also have to do with the hollow, open nature of the spacer the bolt rests against.

In any case I didn't mind the clunk, in fact I liked the feel of it. Made the gun seem more substantial. Might not be for everyone though.

I will continue to update if something bad happens.....
 
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Hey Doug,

When you did this mod, did you actually thread the lower so the tube threads in? Or did you just get it close so it was a tight fit and then use the epoxy? I'm thinking the type of plastic the lower is made out of, would take threads nicely, may be no need to use epoxy?
 
Brett248Vista said:
Hey Doug,

When you did this mod, did you actually thread the lower so the tube threads in? Or did you just get it close so it was a tight fit and then use the epoxy? I'm thinking the type of plastic the lower is made out of, would take threads nicely, may be no need to use epoxy?
Click to expand...

At first I was naive and thought the threads on the tube would cut threads in the receiver extension, but I couldn't get it to work. It kept wiggling on me and would not go in straight. I didn't have any kind of tap, so I decided to get the fit as tight as I could and use the PC7 (strong stuff I must say). I am okay with it being glued in. I think if you have the right tools the plastic will take threads, I just wasn't able to do it with what I had.

Oh and I managed to get the lower painted OD green. I really like it. I'll post some pics soon...
 
These are bad quality pics but....

the boys
 

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Maybe I missed something, but why did you cut out the STOCK buffer tube only to re-install an AR15 Buffer tub??? Why not just leave well enough alone... Help me understand this... I like the fact it looks more like a real AR15, so I'm guessing that is the reason... Just a dumb city old boy... thanks.
 
Low_Down said:
Isn't it the pistol that you did this too?
Click to expand...

NO. I want to be clear here. This always was and will remain a RIFLE. I cut the integral Buffer tube/buttstock off my rifle and replaced it with a real AR15 fixed carbine style buffer tube and buttstock.
 
I total read it wrong in the first post, ill learn to read slowly.
 
PainterlyShotgroup said:
At first I was naive and thought the threads on the tube would cut threads in the receiver extension,

). I am okay with it being glued in. I think if you have the right tools the plastic will take threads, I just wasn't able to do it with what I had.

Oh and I managed to get the lower painted OD green. I really like it. I'll post some pics soon...
Click to expand...

I would have thought the Same w the threading. Did you try to heat the female end up a Lil bit w like a Tile heater? I bet that would done it.

Also the Green lower looks Real good. great Job...
 
J22LR1der said:
I would have thought the Same w the threading. Did you try to heat the female end up a Lil bit w like a Tile heater? I bet that would done it.

Also the Green lower looks Real good. great Job...
Click to expand...

The thought crossed my mind, but I think it would take a lot of heat to make the polymer frame malleable and I feared in doing so I'd be running the risk of over heating and warping or distorting the receiver extension.

Thanks! I like the green as well. We'll see how long it stays on there though...

Did you get your cover installed yet?
 
Not yet, plan on doing it tonight. I also need to Pin my Stock.
I'll get er done tho.

& agreed w the possible warping, I was just thinking the surface would carve threads a Lil smoother if heated.
 
Looks good Doug!

Yeah you would have to spend some money on the tap to do the threads and I'm not sure what the size is. I'm sure it's googleable :)
 
Thanks Brett. While I didn't lay out a step by step procedure for what I did, I think the goal of this thread is to help anyone who's been curious about the possibility of doing this to know it can be done. Also, I'm sure with the right tools a much better job of this mod can be accomplished.
 
PainterlyShotgroup said:
So all this talk about adding a buffer tube to the mp15-22 pistol got me thinking about adding a buffer tube to my rifle. As it happened, I had an extra post-ban Bushmaster carbine style buttstock. It is a fixed stock with a rifle length buffer tube (so even if you could adjust it, you'd have a buffer tube sticking out the end).

Long story short, I ended up sawing off the fake buffer tube at the point where the receiver extension starts to taper down to the fake tube. The plastic ended up being thicker than I thought it would be so I had to hollow out the receiver extension so the threads of the buffer tube would fit.

I mounted an end plate (it hangs over a little, but I figure with a moe grip it won't be too noticeable).
In any case I used PC7 heavy duty epoxy around the threads of the tube (the tube fit very snug in the receiver extension to begin with).
I also added a carbine length buffer spring and buffer. I did this in the hopes that they will jiggle around a little with each shot to give a similar sound and feel as a real AR. Between the buffer and the BCG is an insert which does not move and sits flush with the receiver extension. The BCG will sit against this just as it did with the solid wall it used to and should function properly. But tests will be the final judge of that.

I know some of you will think me foolish for trying this. I can't argue with that. It was foolish, but I just had that itch. Overall I think it looks and feels better. I do plan on painting the lower OD green. Once the glue seams are finely sanded and the weather warms, I will paint it and his should hide most imperfections in the fitment.

Here are some pictures, cheers!
Click to expand...
There is a chance your gun won't cycle properly now. Anything that will affect the recoil will often lead to stovepiped cases in a .22LR firearm. Unlike an AR a .22 is a blowback action which needs all the recoil assist the action has to get the bolt to cycle properly. They have a relatively narrow range of bolt movement that will successfully fire and cycle the next round in the chamber. It will either work, but differently maybe or it won't work at all and you will have a nice wall ornament. If you had left the spring and buffer out it likely would still work like stock.
 
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