Hey, if you need a diagram or small parts then you already bought the gun so go pound sand!
That's my impression of SIG's take on customer relations. We were going to do his/her's MPX and multi caliber but now we are stopping with the ONE we have. There are plenty more choices out there who know how to treat their customers and turn them into repeat customers. My guess is SIG only cater to large police departments or military contracts and individual/small users can have the sweepings from the floor, MAYBE!