Thought it didn't have zero stop until I went to take a picture of the factory box and saw it was marked "zero stop". Whoo Hoo! says I. The only thing lacking on this scope was the ZS and now that it's got it. I'm keeping it to put on my Sword International Mk 15, AR15. I have the new 2.5-10x42mm with MOAR reticle arriving next month.