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12/12/2008 7:52:04 PM EDT
Do I need the commercial or military ctr for my s&w mp15T
12/12/2008 7:54:40 PM EDT
[#1]
Quoted:
Do I need the commercial or military ctr for my s&w mp15T




The only way to be 100% sure is to measure your receiver extension

MIL CTR ID 1.14"
COM CTR ID 1.17"


12/12/2008 7:57:19 PM EDT
[#2]
thanks for the dimensions
12/12/2008 8:01:36 PM EDT
[#3]
I thought all S&Ws use a millspec tube?
12/12/2008 8:03:51 PM EDT
[#4]
In general if the threads are larger diameter than the rest of the tube it is millspec.  If the threads are the same or cut into the tube it is commercial.  But when in doubt measure.
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