I'm pretty sure my trigger and hammer are MIM. I don't have the gun handy to check.

As for the weight thing, yes it is a factor. After working for 16-18 hours straight, which I do a lot more than I'd like to, that 5946 puts a hurtin' on your hips. I don't fault anyone for carrying a Glock anymore, I understand not everyone is tough enough to hump a 5946 all day (j/k). I wouldn't give up my 5946 for anything (well, maybe a .45), I'm very comfortable with it and my ability to use it.