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Old July 18, 2010, 10:47 PM   #3
5RWill
Senior Member
 
Join Date: July 20, 2008
Location: Mississippi
Posts: 2,654
Both but i'm talking strictly length. In other words. If i build a ar-15 with a 14.5 inch upper with a permanent flash hider, is it the same length as a Colt M4 (military). Or is the M4 OAL of the barrel 12.5 + 2" flash hider making it 14.5"?
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