CC9: Running Irons or Optic?

So far, I’ve been shooting my CC9 at the range ~5-25 yards with just the irons. Took a minute to adjust from my Shield Plus 4” w/ EPS Carry. Once I read that the CC9 is factory zeroed at 27 yards(!!) I got a much better feel for it. For the moment, it will not be my primary EDC, so debating whether to throw an optic on it. In the meantime I’ll continue training more deliberately with the irons.

What do you guys think?