So... I know many of you own AR-15's with pinned faux-collapsible stocks. Many of which are held into a Mil-Spec looking extended carbine buffer tube with one screw hole. At leas that's how Stag and S&W do it...

 

Are these tubes for sale anywhere?

 

Also, how long is a normal carbine buffer extension?

The carbine buffer tube is about 7 1/4 long.

Ive never seen a stock like you describe with a screw in it, all the ones Ive seen have been pinned.

 

Edit: Heres a pic from S&W of the M&P15 with the fixed carbine stock and you can see the pin in it. http://www.smith-wesson.com/webapp/wcs/stores/servlet/Product4_750001_750051_785513_-1_757784_757784_757784_ProductDisplayErrorView_Y

 

The carbine buffer tube is about 7 1/4 long.

Ive never seen a stock like you describe with a screw in it, all the ones Ive seen have been pinned.

 

Edit: Heres a pic from S&W of the M&P15 with the fixed carbine stock and you can see the pin in it. http://www.smith-wesson.com/webapp/wcs/stores/servlet/Product4_750001_750051_785513_-1_757784_757784_757784_ProductDisplayErrorView_Y

 

 

How long is an A1 tube extension?

I might have one laying around if you need it.. are 308 and 223 tubes different? probably have both..

i will have a complete bushmaster postban stock with buffer and spring.Bushmaster actually used the standard a2 tube and buffer on these, I am replacing it on my wife's rifle with a normal magpul MOE setup and pinning it as the original BM one is too long for her to shoulder the rifle correctly

I might have one laying around if you need it.. are 308 and 223 tubes different? probably have both..

 

I'm interested. I was thinking of maybe buying a Magpul CTR stock and putting it on that. Since the CTR is a drop in replacement, it should fit on the post-ban extension... or is my thinking off entirely?

you need to know if it is a milspec or commercial size tube BEFORE you get the magpul stock.

 

Here are some pics to show what I'm talking about...

No matter what stock you put on that extension, it'll be the same length. You need a CAR extension.

No matter what stock you put on that extension, it'll be the same length. You need a CAR extension.

 

That's the point. This way I avoid having to "pin" a stock. This length fits me well, and I can get an aftermarket "drop-in" stock that would slip on while having the advantages of a longer extension tube.

 

I want to build a lower with a Magpul CTR stock using this type of extension. Is that possible?

I may have a long extension like you have. Do you prefer a CAR buffer or standard? I've seen both extension versions.

 

ETA: Your ruler shows 10". Is the end against the lower receiver?

I may have a long extension like you have. Do you prefer a CAR buffer or standard? I've seen both extension versions.

 

ETA: Your ruler shows 10". Is the end against the lower receiver?

 

Yepp. It's a little above 10". What's the implication in using a CAR buffer or standard? Is that the spring thing? Or the weight?

Some long extentions take the standard buffer and spring. some take the CAR. Some are different lengths. The CAR was designed for the collapsible stocks.

Some long extentions take the standard buffer and spring. some take the CAR. Some are different lengths. The CAR was designed for the collapsible stocks.

 

If you have one available, that would be swell. I'd like to try my little experiment out and see if a drop-in replacement like the CTR would fit.

without splitting hairs.. I think you will still need to pin.. because even if it only has one hole you can squeeze and collapse the stock as far as it will slide on the tube? no? meaning the stock will still have SOME travel..