Recently my brother purchased a Remington air rifle to a bit of varmint control.
The convention was full of Airguns for Adults! The pic to the right shows an example of air guns that are NOT toys.
AIRFORCE airguns run on compressed air, stored under 3000 psi or standard CO2 for paintball guns.
Very cool stuff. 1000 shots on one CO2 tank.
These were not the only air rifles for grown ups. There will be more on the others later!
--And dammit. They look cool.