Sig Sauer MCX
Built from the ground up for the 300 Blackout, the MCX rifle was always intended to be a multi-caliber affair. It’s easy ability to change calibers, in a about a minute and a half, combined with the upper’s compatibility with standard AR lowers, makes it a flexible beast. Not only can you put an MCX upper on any standard lower, you can use any of the series of Sig stocks or, with an adapter, any standard AR stock on the MCX lower receiver.
Check out the new video on the MCX line:
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