This is the time most historians recognize as the beginning of the modern air gun. A bullet is a projectile propelled by a firearm, sling, or air gun. 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. He had threatened a flight attendant with an air gun. MSPs such as Kenny Macaskill have claimed Scotland has a problem with air gun violence. Air gun laws vary widely by local jurisdiction. Disassembling microchips requires a hot air gun. BB guns are often regulated as a typical air gun. In other legal aspects the crossbow is parallel to an air gun. Legality and ownership of air gun weaponry depends of the power of the air rifle/pistol. A soldering iron or hot air gun can be used with desoldering braid. Sheridan Products Inc. was an American air gun manufacturing company. An air gun is used for marine reflection and refraction surveys. NRA's newest distinguished program is their Distinguished Air Gun Program which was established in 2010.