I did a home trigger job on my Bushmaster and it was super easy. And I didnt polish anything. All I needed was a pin punch and a nylon hammer. My trigger wasnt gritty feeling at all, just really heavy. I was more concerned with the 9 lb trigger(I'm totally guessing here, cause my TP guage only goes to 8 lbs).I knew I could live with a standard military type trigger with moderately long takeup and reset, just not THAT many pounds!
So here's what I did.
Synweap223's two to three minute trigger job. (LOL, I had to do it)[devil]
Tools: non marring hammer, pin punch
First, remove your upper.
I used a punch to push out the hammer pin just to the side of the reciever so I could pull up and remove the hammer and its spring(I went right to left), then reinstalled it but this time, I just dropped one leg of the hammer spring(doesnt matter which side, I did the right) UNDER the trigger pin and down into the control cavity, and left the other side (left)on top of the trigger pin as per the TM.I then tapped the pin back in, put the upper back on and function tested the trigger. I did no trimming of the spring at all and my pull weight came down to about 4.5 lbs now. Reset is still the same as is the takeup. But its just a wonderful smooth breaking lighter trigger now.[wow]
I have been chastised for doing it this way,([flame]you'll have light primer strikes,[flame] bad mojo,[flame] not TM assembly, etc.)I dont mind. It works, every time I pull the trigger.Anyone I let at the range shoot the rifle enjoys the trigger just as much as I do. I have had no FTF's since I did this either, and about 1.5 k on this trigger job all together(Win Q3131A and South African mixed, and even some Wolff too!).
Hell, I wouldnt even call it a trigger job per-se, just some creative assembly of the standard parts. Try it out, you may like it. And no stoning, filing or buying ANY new parts to get it to feel quite a bit better than stock.