I have the same gun and put one on mine, mostly because the stock base pin would fly out during recoil. The Belt Mtn fits a little better and has a locking screw, problem solved.
As for the trigger, you can get spring kits from Brownells, Midway, or places like that. I think I used a Wolff spring kit, it came with a reduced hammer spring, reduced trigger spring, and an extra power base pin latch spring. (this spring alone will probably keep your base pin from flying out).
Or you can take one leg of the trigger spring off and see if that will work for you. It will reduce it some, I didnt really like this method and ended up buying the springs. I also polished the trigger, hammer sear, and transfer bar, to smooth the action.