A good reliable Red Dot Finder thats quite economical. They are light and seem a bit chintzy, but do the job. Even return to zero pretty well after being removed and replaced multiple times. The CR2032 Batteries seem to last a long time and you cant beat the price...cheap enough to buy one for each scope.
Ive got two now and just ordered a third. Have had more in the past.
A few minor problems:
-Sometimes you find one thats a bit dim.
-It can be a trial getting your eye aligned right to see the dot.
-The large unshielded lens fogs or frosts quite easily...you may need to make a cardboard dewshield.