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Originally Posted by CastleBravo
No offense. I like the fact that you can purchase the upper by itsself and slap it on the M-16/AR-15 lower. The 4.68mm round is larger than the 5.56mm(.223 REM) and smaller than the 7.76mm(.308), which makes for a nice mix.
Since the firearm laws are based on the lower, its all good.
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Thanks for the better explanation.
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Sorry if I offend anyone with this message.
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Failed on cheking before posting, have a nice day mister.
