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Discussion Starter · #1 ·
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.
 
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Discussion Starter · #2 ·
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


 
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