The pic rail removable stocks are a beautiful addition to any low recoil carbine. This gun can easily be shot free hand, and is much more maneuverable without a stock. I have a similar chassis on my RugerPCC with red dot. I can easily hit 8 inch plates at 25 yards, using only a 1 point sling for tension.
The worst thing about them right now is the lack of stock options on the market. Sig has a few options for the MPX/MCX, but few if any are available in Canada, or available for import. I Run Guns does have a few Sig stocks on their site, and appear to be in stock. Hopefully we'll get some aftermarket manufacturers in the game soon and see some new options.