12-12-2011, 09:09 PM
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#11 (permalink)
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A True Z Fanatic
Join Date: May 2010
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Quote:
Originally Posted by TROOPER
Maybe his AR is a 300 Blackout, that's a 7.62 round.
When he says interchageable, probably just means we swaps the uppers.
The 300 blackout fits into a standard AR 5.56 magazine.
Only thing different between the 2 AR platforms is the barrel, all other parts are standard AR-15/M4 parts.
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Darren, you sure do know your stuff. 
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