The AWSM-ZPA adjustable windage scope mount facilitates the attachment of modern electro-optic aiming devices to a Zastava Model ZPA (Yugo) rifle via a Picatinny rail and allows for the correction of horizontal misalignments between the receiver-mounted side rail and the barrel. The external windage adjustment tool enables zeroing the electro-optic aiming device with the reticle centered, thus preserving the whole capacity of the scope’s internal windage adjustment mechanism and maintaining the accuracy of the optics.