Thread: Piston Upper AR
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Old November 10, 2012, 05:41 PM   #1
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Join Date: March 29, 2012
Location: Fort Riley, Kansas
Posts: 186
Piston Upper AR

Looking to build my first AR, I am not sure if I can do a piston driven upper but I hear piston driven is the way to go. I want my AR to be 7.62. If anyone has any advice or has done this already please fill me in. Thanks
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