The shooter uses an integrated lever or forearm pump to compress air into an internal storage chamber before each shot. Power varies based on the number of pumps.

Pneumatic airguns rely on compressed air stored in an onboard reservoir to propel the projectile. Unlike spring-piston airguns that compress air at the moment of firing, pneumatic airguns store pressurized air in advance. There are three primary types of pneumatic systems:

The "modern" label isn't just about the power source; it’s about the integration of advanced ballistics and materials.