where can I buy a Mil Spec buffer tube for Sig P556 SBR project?

It seems to be impossible to locate a Mil Spec buffer tube for a CTR Carbine Stock, Mil-Spec Version from Magpul to put on my Sig P556 SBR project.
Does anyone know a website I can order one from?
I will be running the following on it and will post pics when stamp is sent back for SBR. The check just cleared about two weeks ago, so I am trying to buy the following before it gets here so I can throw everything on at once.

Troy flat dark earth quad rails
Pmag flat dark earth 30rnd mag
Magpul flat dark earth CTR Mil Spec
Troy folding battle sight, yup, flat dark earth
Eotech

Any help would be awesome.

…sorry man, I thought these were in stock. Call Grant, he can put you on the waiting list. They are worth the wait IMHO.

LMT Receiver Extention

There’s no picture, Grant also sells the Castle Nut and RE Plate if you need them.

Dave

Try Global Tactical, they probably have an LMT RE in stock, but you may have to purchase the spring and buffer also.

http://global-tactical.com/milspeccarbinerectubespringandbuffer.aspx

I probably have the VLTOR mil-spec one in stock. I also have both LMT and RRA versions of the end plates and castle nuts.

They are not on my website so best is to call (888 534 9585)

Chad
eguns.com

Sorry Chad, I keep forgetting…I try my best to point people in the direction of site sponsors.

Thanks, also, I am pretty sure that I do not need the spring or buffer due to the Sig being a gas operated short-stroke gas piston that is located above the barrel.
I will call today.
Thank you very much.