Bisley Trigger, is a Bisley Trigger.
Hammer's there are 2;
1. Small for the Single Series, 6, and with custom/ gunsmithing 7,9,10.
2. Large for the rest, Super, Blackhawk, Vaquero, NV.
Will a Bisley trigger work in a regular Blackhawk?
Easy, Yes, if your using a Bisley Gripframe.
Yes on a Blackhawk Gripframe too, but will require "chop, cut, re-build" better known as custom gunsmithing. :wink:
In other words, the Bisley Trigger is slightly longer and more curved and longer in the area where it meets the GF hole.
To use the Bisley trigger in a Blackhawk GF, one needs to shorten the trigger length a little, and either shorten the material at the GF hole -or- open up the hole in the GF.
I have seen both methods, I prefer chopping the trigger as it is the cheaper of the two parts, cleaner look, and IMO easier task to perform.