What is a common fault of the PSO-1 scope used with the SVD?

The PSO-1 scope, utilized in conjunction with the SVD (Snayperskaya Vintovka Datega), is known to exhibit a common fault related to its ability to maintain zero and the overall precision of the shots fired. This issue generally arises from the scope's mechanical design and construction quality, which can lead to the reticle drifting or the adjustments for windage and elevation becoming unreliable over time.

Maintaining zero is critical for effective long-range shooting, as any deviation can result in missed targets. The PSO-1 is designed to be used at varying distances, and when it loses its zero, the shooter must frequently re-adjust or check the scope's settings, which can disrupt the shooting process and lead to inconsistencies in performance. This particular fault can significantly affect the effectiveness of the SVD as a precision rifle.

Other choices highlight compatibility issues or limitations of the PSO-1 scope that are not as prevalent or critical as the zeroing issue. These factors might contribute to the overall use and effectiveness of the scope, but they do not specifically impact the reliability of accuracy in the same way that losing zero does, making it a more pressing concern for users of this scope.