Before we get to the new SIG Copperhead, let’s look at how we got to the latest MPX line entry. When sigsauerweapons.com first unveiled the MPX a few years ago, everyone in the gun world did a double-take. Here was a truly next-gen submachine gun that allowed you to switch barrels and configurations, and SIG quickly followed up with semi-auto versions. Consider it a beautiful sendoff to the HK MP5.
he MPX’s groundbreaking modularity led to other successful platforms, like SIG’s MCX and P320 series. And then you had other MPX variants, including the MPX-K, the shortest of the bunch like the hallowed MP5K. Until now.
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