Anyone know where I can get a national match front sight for my Bushmaster 16"? I also need a lighter trigger for my bushmaster.

For a lighter trigger, I would suggest the Accuracy Speaks single stage trigger. Probably the best trigger upgrade for a general purpose rifle.

There was a thread here about a week or two ago where AFreeMan described how to do a very nice trigger job using the parts that are already in your rifle.  

Can't search for the thread, but here's a link to the info:

kit.homelinux.net/gunstuff/15MinTrigJob-AR15.html

I did it and I also did a rock river national match trigger on my other rifle at the same time.

I honestly can't decide which one I like better yet.  I'll shoot some more and I'll come up with a verdict.