No practical use or value. Seriously, you'd be better served with a Glock in a RONI with the pistol brace, in fact you'd probably have more barrel length and rifling and by George, it would be MUCH cheaper too.
I mean, God Bless Sig for the pistol brace, but much of the other stuff they've come out with, like the P(roblamatic)365, the Epic Fail P250, the Mosquito... they're guns that make people bang their head against the wall. Sig has quickly become my least favorite gun company mainly because they treat their employees like dung and have terrible management on the manufacturing side. People say, "Oh, Sig is doing so well, they're always hiring!" There's a reason why and a reason quality has gone down so much over the years.
Sig guns... IMO, you can do as good for less. Unless a DA/SA is an absolute must for you, there's many other options besides Sig. The fact that they hold the MHS contract now is the greatest bit of free advertisement they could ever have because now the video gamers in Call of Duty are gonna see the M17, gonna see this Copperhead with Sig's name on it, and automatically think it's the greatest thing since the Tommy Gun.
With that MHS contract, Sig doesn't even need to try anymore. They're set for the next 30 years.