Is the P220 DAK trigger bar spring the same as the DA/SA spring ? I have looked at several vendor pages and cannot see any notes referring to either.

Short answer: no. If you use older grip panels there may be a minor fitment issue with the newer trigger bar spring.

P220 trigger bar springs for DAK and DA/SA models are the same.

Thanks fellows. This is a used P220 I picked up with no box. Serial number estimate puts it in 2014.