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AR15.COM
7/14/2007 7:26:45 PM EDT
Bought a Superior Arms lower from Brigadoons. I'm looking at the ace M4 Socom stock for it. Whats the deal with the military spec vs the commercial? I see that some stocks list either/or. Not the Ace though. Will it make any difference? Or will I need to go with a stock thats either one or the other? I dont know for sure, but if I had to guess, the superior is probably commercial.

Or as I am now thinking, is it based solely on the buffer tube? In other words, does the receiver have anything to do with it at all?
7/14/2007 8:42:13 PM EDT
[#1]

Quoted:
Bought a Superior Arms lower from Brigadoons. I'm looking at the ace M4 Socom stock for it. Whats the deal with the military spec vs the commercial? I see that some stocks list either/or. Not the Ace though. Will it make any difference? Or will I need to go with a stock thats either one or the other? I dont know for sure, but if I had to guess, the superior is probably commercial.

Or as I am now thinking, is it based solely on the buffer tube? In other words, does the receiver have anything to do with it at all?


I believe they are referring to the buffer tube, not the lower.  The Ace stock will work fine for the Superior lower.  Just make sure that you have a milspec or commercial buffer tube (whichever) is needed for your stock.
7/15/2007 8:16:49 AM EDT
[#2]
Yup it is refering to the buffer tube.  A commercial tube is a little larger but has smaller threads the milspec tube has larger threads and offers a much more secure lock up with your lower.

I believe a commercial stock will fit a milspec tube but will rattle and be loose a milspec stock won't fit a commercial tube without a hammer.

I'm in the process of changing my commercial to milspec.
7/16/2007 6:19:30 AM EDT
[#3]

Quoted:

Or as I am now thinking, is it based solely on the buffer tube? In other words, does the receiver have anything to do with it at all?


You are correct. Mil vs. commercial is strictly the diameter of the tube. Either one will screw into your lower.