Being new I doubt the recoil spring is the issue but one never knows.
Kahr uses Wolff springs so no harm in trying one and it never hurts to have a spare if you find the issue is something else.
Is it going into full battery during these misfires, or stopping just short of full lock up?
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."