I put an optic mount - the one that replaces the rear sight - on my VZ 2008. Mounted a Primary Arms red dot.
After sighting it in, I shot a 5 shot group at 100 yards. It was 3". I was so much more than pleased. I was never able to get better than about a 7" group with the iron sights, with my old-ass eyes. couldn't be happier with its accuracy now.
Love that little carbine.