Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Cheap and not very useful.

The only reason I gave these 2 stars is because you get five of them. This is not a good alternative to a real high visibility sight (tritium or even fiber optic). They are cheap plastic and they will melt if you fire your rifle for an extended period of time (which most people with AK's do). Further, they simply do not show up in bad lighting conditions much better than the standard black sights. Save your money and get a real hi-viz or other metal sight with tritium/fiber optic.