M&P 15 Stock Milspec or commerical

[devildogljb]

I bought a new m&p 15 in sept and i want to change out the stock. I keep reading different things and i need to know if the stock is milspec or commerical any help i would appericate it Semper Fi

[Quiet-Matt]

They're mil-spec.

[vigilant2]

I have a S&W M&P lower mated to a 6920 upper, its a milspec
extension/buffer tube, one of the main reasons I went with it.

[devildogljb]

ok thanks every one admin please keep open just to make sure i would appericate it

[markdh720]

I have heard most M&Ps have mil spec receiver extensions, including the M&P 15-22s, but according to http://store.magpul.com/downloads/Re...Comparison.pdf
my M&P 15 MOE is a commercial spec extension. I have that 2nd hole/position for the stock that the mil spec diagram doesn't show. I've never taken the stock off so I haven't checked the angle on the end of the tube. Some people haven't believed me when I said this before, so I may post a pic when I get home from work so you guys can correct me if I'm wrong.

[GLOCKMASTER]

A very quick Google search produced the below pictures. If you will look at your lower receiver extension and compare it to the below pictures it will more than answer your question.

[Quiet-Matt]

I have 2 mil-spec RE's from Bravo Co. and one S&W complete lower with mil-spec RE and all of them have 6 holes.

[devildogljb]

well after i i messuared mine came out to be a milspec and the picture you have posted is a little deceiving my buffer tube is has the 6 postion also so hopefully every one doesnt really go by the looks

[markdh720]

So milspec extensions can have six positions? As much as I've looked it up, nobody has ever said that. Thanks, guys, have solved a riddle for me. I was about to go buy a caliper to figure it out once and for all.

[devildogljb]

Well after i used my calipers yes i used two to make sure a digital and standard one, it came out to be milspec and its a 6 postion stock