Beeman Mantis 177 Caliber Pellet Air Rifle with Scope

The advanced technology of the gas ram system uses compressed gas in a sealed, self-contained unit that is designed to replace the mainspring in a conventional air rifle. The air rifles cock like any other barrel-cocking airgun, but the single cocking stroke compresses a cylinder of gas instead of a mainspring. When the trigger is pulled, the compressed gas expands and drives the piston forward. The main advantage in a gas ram air rifle and a real advantage to hunters is the tireless gas ram pow