A nitro piston (gas piston) air rifle allows for smoother cocking, up to 70% noise reduction, and less recoil than their spring piston counterparts. Nitro (gas) piston technology allows the gas piston air rifle to be cocked for long periods of time without any damage to the piston.
Gas piston air rifles typically last twice as long as spring piston air rifles and can be purchased for a decent price without breaking the bank.