buckrubboy, That atomic one pin is not an in the field adjustable sight in the same way that an HHA is. It is designed to be sighted in at a certain distance and locked down tight. It is a non adjustable single pin hunting sight.

If you are looking for one that is adjustable in the field then HHA is top of the line and if this type of sight is what youwant you will be very happy with the quality and precision of HHA.