I am very impressed with the MP40. About the only weak spot I can see in this gun is the trigger itself. I am used to rugged steel triggers on my guns and the trigger on the MP looks rather fragile, being made out of plastic and pierced with pins for the parts to rotate on. I can't find any posts on broken triggers or trigger failures which speaks well for this design. Just wondering if anyone else has any thoughts on the durability of this design? Will it hold up for the long run?