This is a Crosman Air Rifle known as the 760 chambered in 177BB, model 760B.
The legendary Crosman Pumpmaster offers a simple solution for the beginning shooter. With easy-to-use features like variable pump power for velocity control" this repeater shoots BBs or pellets with power and accuracy. The elevation-adjustable rear sight and blade front sight help you stay on target. For over 50 years the Pumpmaster has been "taking it outside" for plinking and target shooting fun!
Features:
Elevation-adjustable rear sight
Blade front sight
Shoots BBs or pellets