This Grizzly X2 is a gas ram air rifle and is a real advantage to hunters. The tireless gas ram power plant is unlike a steel mainspring, can never take a set or tire with age. Another advantage is the shorter lock time, which aids in field accuracy, as there is less time for the shooter to pull off target. The air rifles reliable performance in any weather, smoother cocking effort, and more consistent power and velocities make for a truly exceptional airgun.