Beeman Blue Ribbon SS1. 2.5 x 16. These are tough tiny little scopes about 5" long. Even though it is only 16mm it is very bright. I had one mounted on a 25 cal Kodiak for a long time. These scopes have integral bases with different spacer pins to make the mount fit different width rails. They are a good alternative to a peep sight for someone who wants something small but really durable. I have had 3 or 4 of them and sold them to buy higher magnification scopes but I wish I had another one. These scopes were also covered by the lifetime warranty before Hakko went bankrupt.

David Enoch