My dad took me to a gun shop to purchase my 39A back in 1956. I used that rifle as-in till just a couple of months ago. After arriving home from hunting, I began cleaning the rifle and noticed that the trigger screw in receiver section was loose. I though long and hard whether to add some locTite or remove the screw and see if there was a way to improve the trigger. The trigger on that rifle was somewhat heavy, breaking somewhere near 7 pounds.
I decided to do the disasembly and inspect both the hammer sear and trigger engagement. To my surprise, I found that the original trigger screw was undersize and that the trigger "floated" on the screw until the hammer sear was engaged. I also found that the trigger's sear engagement element was not square to the trigger body.
A friend that happens to be a master machinist asked to help. He made a new trigger screw that was a perfect fit and also calculated and cut the trigger to properly engage the sear. The result is a 3-3/4 pound trigger with almost no creep.
Anyone else that has a 39A with a terrible trigger may wish to have the screw checked. (If the trigger wobbles left and right when the hammer is held back with the thumb, the screw is undersized) I believe that just replacing the screw may be a major benefit if there are no other problems.

great helpful post. just one of the things that makes ar

How does it shoot? My 39 shoots pretty good and it's just something about shooting a lever action.

Steve......