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Old 02-09-2011, 13:49   #2
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Join Date: Oct 2010
Posts: 15
This is like gen 3 vs gen 4. It all boils down to both have their advantages/disadvantages. Look at what you need it to do and decide. I went with di since its been proven to work for so long, also when i saw the breakdown of both systems and saw all the extra parts in a piston system so I went with the minimalist approach, pretty much the same reason I use a glock. All those brands are gtg for uppers, everyone has their favorite brand.
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