SIG SAUER developed the MCX rifle for America’s special forces. Their goal: a firearm that’s as quiet as an MP5, as deadly as an AK-47, and more modular than anything ever designed. Originally chambered in 300 AAC Blackout, SIG built the MCX to fill the same need that inspired AAC’s Honey Badger. I’ve been watching the SIG SAUER MCX come together for well over two years, from the first prototypes to the finished product. The military version is a useful firearm; even with a massive silencer attached, shooting in full-auto, the MCX is extremely controllable. It’s more like a big MP5 than anything else. [Click here to watch.] My biggest concern: would SIG SAUER translate the mil spec masterpiece into a useful semi-automatic civilian model? They certainly started on the right foot . . .