SIG MCX Virtus Rail, Black, Midwest Industries

Just purchased an MCX Virtus rifle that came with several rails and this black one from Midwest Industries I dont like with the rest of the rifle being grey. Im pretty sure its the 10" or 10.5" rail as I have the full carbine 15' rail mounted now and its shorter than that. The rails in that length run from $150-$170, asking $100 shipped. I dont have paypal so money order or google pay. I'm not sure if this will work on the sig rattler, it does attach the same way but I am not well versed in this weapon system or the rattler. As far as trades, could use a set of grey magpul MBUS sights to go with my new rifle.