The Beeman Grizzly X2 Gas Ram Dual Caliber Air Rifle Combo w/4x32 scope is like getting 2 rifles for the price of one! Includes .177 caliber and .22 caliber barrels. Each barrel has a red fiber optic front sight and green fiber optic rear. The Beeman 4x32 scope will help get the most accuracy possible from the gun. Max velocity in .177 is 1000 fps, in .22 is 830 fps.