Other than the mechanical differences in the newer MIM parts, like the design of the sear in the hand and trigger stirrup and lever changes, for instance, the triggers would be dimensionally the same (minus the hand) in the models you list. The hammers are different, and are not interchageable among those models. (Hammer dimensional differences are seen in the portion of the part that is above the DA sear. From the sear pin down they are the same.)
Keep in mind these are not generally "drop in" parts and must be fit.
The photo illustrates some of the more obvious dimensional differences among the older, forged hammers.....these are not all "target" hammers. Left to right....K, L, N.
[IMG]
[/IMG]