HELP!! Any M&P15 Sport 2 California Compliant model owners out there??

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hawaiiboy58

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I recently contacted Smith & Wesson asking them if I had a “Mil-Spec” or “Commercial” buffer tube for installation of the Magpul MOE Fixed Carbine Stock and was told that it was a “Mil-Spec” and most stocks that were “Mil-Spec” would fit. I ordered and received the stock and tried to put it on my M&P 15 California Compliant model but the buffer tube on my rifle is too large. I measured the buffer tube with electronic calipers and it measures 1.17”. If I measure the threaded area of the buffer tube it measures 1.15”. According to the instructions I received, the “Commercial” version measures 1.17” and should have an angled end on the buffer tube. Mine does not have the angled end. Even with either of the supplied extensions that they include, the front of the stock would not be even close to the Castle Nut. The only way for this stock to work would be to drill a hole through the bottom portion of the buffer tube for the screw but that is not even possible because the stock won’t slide over the buffer tube. PLEASE, has anyone run into this problem??? I have a call into the company I purchased the stock from but being the weekend, they’re closed. Any information would be greatly appreciated!!
 
I read somewhere that the compliant model receiver extensions (buffer tubes) are longer than standard buffer tubes so that the stock is pinned at full extension. You will need to either get a new receiver extension, or cut the excess length off (just go with a new one)... when you order the new one, order a Mil Spec version if that is the diameter size of your Magpul stock. It was my understanding that the compliant models used mil-spec diameter though, so not sure why you cant at least get the stock to slide onto the extension.
 
Thank you very much for the information! Not even the extensions that Magpul includes with the stock will go over the buffer tube. You are right the buffer tube does seem way too long for the Magpul Stock. They really make things difficult with these compliant versions! If you can think of where you read this information please let me know. Thanks again!
 
I would agree with our good Texican compadre. It would be easier to just replace the buffer tube with one that is carbine length. Seem to recall that back in Mass and NJ, the guys there had the same issue. Buffer tube that S&W used was rifle length, but was fitted with a carbine spring and buffer. I think a little google search would confirm that.
 
Thanks for the added information! I'm new to the AR15 world and was looking at buffer tubes and see that most of them are 5-6 position tubes. If I use the Magpul Fixed Stock I was talking about can I purchase one of those tubes and since the stock is fixed, wouldn't I still be California legal?
 
All DOJ says is that the stock can not be adjustable or folding. With the Magpul FCS, which is the one I use to go featureless, you can not fold it or adjust it once installed. And my sport II is one of the ones sold prior to 1Jan, and originally had the normal adjustable stock. So unless DOJ gets a wild hair again, you, me and a lot of other people are/will be legal.

When you get a new buffer tube, get a mil-spec 7075 tube. Some tubes out there are made from 6061 alloy. A 7075 alloy tube will match the alloy used in the lower.
 
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Yeah I found on Primary Arms website a Bravo Company Manufacturing Mil-Spec Carbine length buffer tube kit that is made of 7075-T6 aluminum with a standard carbine buffer, carbine buffer spring, receiver end plate, and castle nut complete the kit. It cost $57.95 for the kit. Got really good reviews from people. I figure I might as well get the kit so I know everything will fit together. Then I can still use the Magpul stock that I purchased.
 
It sounds like you have a Civ spec buffer tube on your rifle. None of the "features" described to you are always true. The only thing that matters is the actual diameter and yours is larger so, it's a Civ spec.

hawaiiboy58 said:
Thanks for the added information! I'm new to the AR15 world and was looking at buffer tubes and see that most of them are 5-6 position tubes. If I use the Magpul Fixed Stock I was talking about can I purchase one of those tubes and since the stock is fixed, wouldn't I still be California legal?
Click to expand...
Any fixed stock is acceptable as long as the over all length is greater than 30".
 
After researching even more last night, I see that my buffer tube is not as long as the "Rifle" buffer tube but not as short as the "Carbine Length" buffer tube. It's somewhere in between those two. The diameter of the tube is at "Commercial" diameter of 1.17". I think like others have mentioned, it would be best to change the buffer tube to "Mil-Spec Carbine Length". I think that's the least expensive way to be able to use the Magpul MOE Mil-Spec Carbine Fixed Stock. Thanks for all the info!
 
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