I doubt it would come from SIG though. It would compete with the MPX sales.Come to think of it, I know that Sig is having a hard time keeping up with orders on the MCX, but..... how the rifle was built from the get go, they could really branch out to other calibers easily, different bolts and magazines, be it probably proprietary, but still, alot of combos could be had....
They already make one. It's called the MPX...Was wondering how much would need to be changed in order to make it happen. I know it's not a big deal to do it on a regular AR platform rifle. But I know the MCX isn't your typical AR. Would love to see an aftermarket offering that would allow us to run the MCX as a 9mm sub gun. I'd jump on it in a heartbeat.