I'm not sure if such a thing exist but I would like to reduce the weight for the trigger pull for my Bersa Thunder .380.
No modification kits available. You would have to take it to a gunsmith for any modifications. However, that trigger is great and I don't know why you would want to mess with it.
Trigger I agree, the trigger on your Bersa is great out of the box and gets better as you shoot it. Ive been told there is no need to play with the trigger and I believe if you do and it is sent in for warrenty they will put it back to stock anyway. And I wouldnt just trust any gunsmith to touch my Bersa unless he was a "Bersa" Gunsmith.