Things I liked: This scope mount set is the ONLY way one can mount a scope or red dot soght on the barrel of a Crosman 1377 pump pistol air gun. They work perfectly.
Things I liked: The Crosman 0290 Red Dot sight increases the pleasure of shooting my Crosman 1377 air pistol 200%. My old eyes don't work well with iron sights anymore. This sight is very inexpensive and works quite okay. There is no brightness control so it is a little bright for indoor shooting but works fine outdoors. I liked mine so well, I bought this one for my brother.
Things I would have changed: Add a brightness control.