Just picked up my MPX pistol yesterday and today I spent a little time cleaning it and getting familiar with assembly/disassembly.
During my tinkering session I noticed there are no roll pins installed in the upper receiver holes for the charging handle to latch on to. The handle seems to stay put even with the bolt locked back, however I don't want to damage this thing in the first magazine.
If any of you folks with newer production guns could check yours to see if the pins are there I'd greatly appreciate it. Sig obviously changed a few things with newer builds since mine has a rubber "accuwedge" instead of the tensioning screw in the lower (verified this is normal), perhaps they decided the roll pins weren't necessary.
Many thanks!

Does yours have a firing pin spring?

It does have a firing pin spring.

Mine at first did not have a spring. At around 300 rounds the firing pin broke.
Sig replaced the bolt carrier with one that will accept a spring, along with a new firing pin and spring.

I have a gen 1 none of these issues and mine came with the roll pins and the firing pin spring.

What are these roll pins your taking about. does the gen 2 have these. I have a firing pen spring. But I've not seen any roll pins

Look at the back of your upper receiver, viewing from the top. You will notice two holes located in the area directly behind the last section of picatinny rail.
These holes are used to install roll pins on each side for the charging handle latches to catch on.

As stated in my original post, mine did not have them, however Sig remedied the problem in extremely quickly, paid shipping both ways, and sent me all kinds of extra goodies for the inconvenience.
Overall I am extremely pleased with both the service I received, as well as with the gun itself.

That's great to hear they are backing their product and correcting their mistake.