[Guest]

How can I tell if my buffer tube diameter is milspec or commercial? I am interested in getting a Magpul CTR stock and am not sure if I have a commercial or milspec. The manufacturer of my stock is DSC.

 

[Guest]

If you have a mic or a set of calipers it would be easy to tell.
1.145+/- mil spec 1.175+/- commercial

Double Star IIRC is commercial

in this pic com on the left mil on the right

 

[Guest]

where do you measure from ? ID? OD? in the grooves ?

 

[Guest]

http://www.magpul.com/pdfs/technotes/ctr/buffertubeid.pdf

 

[Guest]

Here I even make a JPG for you.

Anything is better then work.

 

[Guest]

Excellent! Thanks for the info.