Buffer Tube Question - Have Commerical Want Mil-Spec

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blacksky

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I need more Help! See my last reply.

My AR 15 has a commerical buffer tube with a fixed stock. I want to replace the tube with a mil-spec tube and add a Magpul MOE collapsible stock. My question is since the diameters of each tube is different are the thread diameters the same on both tubes and will the mil-spec tube thread into my receiver? :confused:
 
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Oops, I re-read your initial post.

Magpul MOE stock requires a carbine buffer tube. A carbine buffer tube requires a carbine buffer. The carbine buffer tube and buffer are both shorter than the rifle buffer tube and buffer. If you use a long rifle buffer in a short carbine tube, your rifle will short stroke and fail to feed.
 
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Also bear in mind that the buffer assembly is matched to the barrel length. Thus, if you are shooting a 20" barrel, you need the full length recoil spring and long buffer. The spring and buffer are different for a 16" carbine in .223, and different also for the pistol caliber AR's.
 
My AR 15 has a commerical buffer tube with a fixed stock. I want to replace the tube with a mil-spec tube and add a Magpul MOE collapsible stock
Click to expand...

You well need a new receiver extension (tube), buffer and buffer spring.

magpulbuffertube.jpg


Also bear in mind that the buffer assembly is matched to the barrel length. Thus, if you are shooting a 20" barrel, you need the full length recoil spring and long buffer. The spring and buffer are different for a 16" carbine in .223,
Click to expand...

No, a 20" barrel well be fine with the standard carbine RE, buffer and spring. If anything a carbine gas system may benefit from a H or H2 buffer.
 
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I also bought an AR-15 that came with a fixed A2-style stock, and I wanted to add a Magpul stock, and I needed to learn about the stock stuff because I was new to it so,

I found that my Bushmaster came commercial BUT as they said the threads are the same, I needed a new buffer, buffer tube, spring etc. and therefore it could be mil-spec OR Commercial, they screw in the same. I found a deal on a complete kit, I think maybe DSG Arms? I got a Magpul CTR Stock with all the stuff I needed, a Complete Kit, for less than the cost of a Magpul CTR on other sites. They also had the same type of kit for MOE Stocks and ACS Stocks, it was a great deal. You can check around for the type of kit I am talking about, so it gives you what you need to change the stock.


ALSO, I found this out the hard way on my 15-22, now is a good time to add a stock-mounting-plate onto the stock receiver extension AKA Buffer Tube, if you're changing the stuff now, you can add say a Magpul ASAP or a CQD sling mount plate, like i used. this way you do it all at one time.
 
To All That Have Responded To My Questions... I need more Help!

I just ordered A T7 7075 Mil-Spec Tube complete kit and I'm going to swap them out and use the Magpul MOE stock that I have new in the box. :)

:) Thanks to everyone for the input! :)
 
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