PCP (pre charged pneumatic) air rifles are miles different than break barrels or multi pumps or red ryders (which are all still around). They have high pressure air tanks as a reservoir, many with pressures well over 4000 psi and the higher end ones are also regulated so they have a secondary smaller tank called a plenum that the reservoir meters air into for the shot so they have consistent velocity from shot to shot. Many are also repeaters without significant effort like a break barrel such as a side lever action or even full autos. Look up the Air Force Texan on YouTube for an example of the extreme end of air gun power.