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Posted: 6/17/2009 7:20:21 PM EDT
It doesnt mean anything to me as far as cool, but Im buying a new stock and its just the stock and it doesnt come with bugger tube or anything. I need to know which to buy I got a 4 position on there now.
Link Posted: 6/17/2009 7:28:26 PM EDT
[#1]
you can measure. the easiest way to tell is if it has a slanted end or straight.

The slanted is comm.
Straight is mil-spec.

Need to find a pic.       here you go.

Link Posted: 6/17/2009 7:30:54 PM EDT
[#2]
Who made your extension.  Some are mil spec some are commercial.  Don't have access to a set of calipers?  Mil Spec is 1.146 inch I believe.  Commercial is bigger, at 1.17 or so.  You can put a commerical on a milspec, its a little loose.  CAN'T put a milspec stock on commercial tube.
Link Posted: 6/17/2009 7:50:11 PM EDT
[#3]
Quoted:
you can measure. the easiest way to tell is if it has a slanted end or straight.

The slanted is comm.
Straight is mil-spec.

Need to find a pic.       here you go.

http://www.laruetactical.com/pics/BufferTube/CTR_Stock_Specs.jpg


Your the man thanks.
Link Posted: 6/17/2009 8:23:59 PM EDT
[#4]
Quoted:
you can measure. the easiest way to tell is if it has a slanted end or straight.

The slanted is comm.
Straight is mil-spec.

That is NOT a definitive way to tell.

Just look at the where the tube meets the threads.  It's easy to see the difference in the photo that was posted, that is definitive.
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