This is a Daisy Air Rifle known as the Buck 105 chambered in 177BB, model 2105.
The Model 105 Buck is built for the smallest shooters. It is the No. 1 choice for a youth's first gun. With an overall 29.8 inch length" it fits better and allows for the development of shooting skills better than other guns.
Features:
Crossbolt trigger block Safety
Smooth bore barrel
Spring powered