Hope you have good luck with the atec,just got a new one back last month,it was the 3rd time I have sent it back,put it on an encore 45 cal and went to the range today,after shooting for groups I decided to zero it in with the bullet that shot the best group then found out it wouldn' t track,if I turned it to go left it wouldn' t move or move the opposite direction.going to try it on a center fire and see if it is the same if so I think I will just throw it in the trash can.