Sig 556xi Review

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SHOT Show 2014 New Guns: SIG 556xi Review

Introduced at SHOT Show 2014, the SIG556xi can be changed to any of three calibers, 5.56x45mm NATO, 300 Blackout, and 7.62x39mm. Users can also quickly change out the non-serialized lower receiver, allowing the use of either AR-style STANAG or rock-and-lock AK-style mags.