I am thinking of getting a receiver peep sight that fits the dovetails on an older Brno 22. Ideally it should be adjustable to work with the stock front sight. I looked at one from New England Custom Guns at US$99 but not sure if it would work on the Brno. I am not looking for 1/2" at 50 yards but more like minute of squirrel at 25 yards. Any recommendations?