The pistol uses dehumidified compressed air as propellant for the diabolo air gun pellets. The rifle uses dehumidified compressed air as propellant for the diabolo air gun pellets. Each viewport blows fresh dehumidified air across its glass to prevent fogging. This system both dehumidified and filtered the air. The portable telescopes are stored in a dehumidified storage room on the veranda. The now dehumidified, re-warmed air is released into the room.