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Old December 4, 2012, 08:59 PM   #9
Senior Member
Join Date: February 2, 2010
Posts: 3,293
Switching out uppers allows the shooter to maintain the same trigger pull and feel. If you're in a backward area where obtaining the serial numbered "firearm" is difficult or a legal hassle, having multiple uppers for one lower is a solution. Right now, I have more uppers than complete lowers but that's being remedied.
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