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AR15.COM
AR Sponsor
11/14/2008 12:47:36 PM EDT
Is it illegal to mount an upper on a lower which is marked for a different caliber, hence the need for a "multi" marking? (i.e. 5.56 to 6.8)
11/14/2008 12:53:17 PM EDT
[#1]
No.
11/14/2008 1:04:53 PM EDT
[#2]
Good
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