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Old January 21, 2013, 08:37 PM   #15
Senior Member
Join Date: January 28, 2006
Posts: 1,284
@Skans... Knew all of that and own ARs with FSB, railed gas blocks, and low pro gas blocks. I just wasn't aware that they hid a low pro under the hand guard on the dissipators and maintained a carbine length gas system.

You see an FSB and just kinda assume that, of course the gas tube goes in there.
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