optic has overall good build quality and the glass is crystal clear, but I tried zeroing on the the 4 times magnification and it was aimed perfectly but once I flipped to the 1 times magnification the zero was completely off. In terms of zero shift the only problem is windage, Elevation was perfect for the optic. Unable to zero both 1 and 4 times magnification together so I was kind of disappointed especially with the price tag at 319.95 $.