Benjamin Model 273 Peep Sight
The are reproductions of the Model 273 Peep sight sold by the Benjamin Air Rifle Company from 1948 to 1986. These are made from blued steel and are identical to the originals. They fit in the slot behind the cam plate on Benjamin 310, 312, 317, 340, 342 and 347 rifles.
The sights are adjustable for elevation and windage.