One could purchase taser guns for home and personal safety and security in several places. Some places that one could purchase taser guns are: eBay, Amazon, and tbotech.
One can purchase water guns online from a number of retailers. They are available to purchase from retailers such as Amazon, eBay, Walmart and Toys R Us.
CO2 air pistols can be purchased from sporting goods stores, online retailers, gun shops, and specialty stores that sell air guns. Make sure to check local laws and regulations regarding the purchase and use of air pistols in your area.
Air soft guns are popular over the nation. Do not use one if you are not at least 15 :).
In most states, or at least where I live, there is no age requirement on using airsoft guns, but you must be 18 to legally purchase them.
When you turn 18 you can purchase one.
If you wish to purchase Taurus guns they are available from GunBroker, and Buds Gun Shop. They can also be bought direct from Taurus through the company website.
Air guns are not held to any firearms restriction other than age to purchase in Texas that I can find or know of. Act irresponsibly and you will pay the price though. I know people who shoot in their garages and homes! Get a silent pellet trap and no one will know you are shooting. Ebay has a good one for about $70.
There are many places where one can purchase a Flair Air Purifier. One can purchase a Flair Air Purifier can do so at popular on the web sources such as EBay, Air Purifier Exchange, and EcoQuest Air Purifiers.
'GunsAmerica' have a number of categories of guns available for sale. One can purchase rifles, pistols, revolvers, shotguns and tactical guns. One can also buy ammo from them.
One can purchase carbon air filters at an online retailer such as Amazon or eBay. Alternatively, one could purchase carbon air filters directly from a specialty website such as HTGSupply.
You need a licence to purchase one