Good optics is not cheap - Alpen 20x50 Waterproof Mini Spotting Scope w/ Sunshade, Tripod, Carrying Case

Tried the Alpen 20x50 at 25 yards to sight in an Axis 223. I was able to accomplish the 25 yard task,but with considerable difficulty. The optics was adequate up to 50 yards, possibly even a 100, but the tripod is another story all together.
The tripod was very flimsy, difficult to adjust, and therefore time consuming. This rig is so light weight that the percussion from every shot moved it necessitating continual re-adjustments.
In summary, you get what you pay for. For $66, it was worth a try, but was not adequate for me.