The large frames and small frames will always be slightly different when it comes to triggers because the bars themselves are different as you know. Also, the 45's use the large fpb unlike any other Glocks, even the 10mm's. The regular frame Glocks have slightly better potential for good triggers IMO. The best trigger in any of my 10's and 45's is the trigger in my 36 which uses it's own trigger bar. It is also bone stock on mine, down to the 'old 5.5' connector. The large frame trigger bars can be made lighter by tweaking. I have done it just to see what I could do but don't use it often.It SHOULD...but no 2 Glocks are the same. Unless you are magic like Johnny Glock, you might get close if you installed the same set up in 2 different guns. The set up in my G21 is 5lbs...but feels less with hardly any wall. In my G19 it's 4.5 lbs, but has more of a wall.