I don't have the Mcarbo springs but all my Kahrs have about a 5# trigger from the factory. 5 or just slightly more so with the long forgiving pull I don't think the trigger would be too light. Course you'll be able to tell as soon as you try it.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."