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WATCH: SIG Sauer MCX Rattler 5.56 NATO

The SIG Sauer MCX Rattler model first emerged in late summer 2017 as an ultra-compact variant of SIG's popular MCX carbine, an AR-style tactical rifle with a number of enhancements, like the elimination of the rear buffer spring and tube. However, the MCX platform still retains AR-style controls and accepts all STANAG magazines and AR-15 pistol grips.

SIG put a new twist on the platform with the Rattler, though, equipped with a ultra-short, 5.5-inch barrel and chambered in 300 BLK. Though the 300 BLK is optimized for use in short-barrel guns, ammo availability can't hold a candle to the ubiquitous 5.56 NATO, so for 2019, SIG expanded the Rattler lineup to include a 5.56-NATO variant in 2019.

For all the details on the SIG Sauer MCX Rattler in 5.56 NATO, check out our video above. For all the details on SIG Sauer's new guns for 2019, see our range-day roundup here.

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