Firearm & Gun Forum - FireArmsTalk.com > Long Guns > Auto & Semi-Auto Discussion > AR-15 Discussion > sig 556 or build my own AR?

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Old 10-12-2010, 05:04 AM   #51
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Join Date: Oct 2010
Location: Columbus,Ohio
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The sigs go for 1K to2K depending on the model, but the main difference is a piston driven bolt that prevents the bolt from fouling up,and a folding stock. It's very dependable. I have one.


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