Guns: Buying guns online in California and sales tax.?

I live in California. I would like to buy guns online. I notice that there is no sales tax, since I'm buying from another state. However, would CA sales tax apply if i were to ship it to a FFL dealer in California? In addition, what about ammo or any other accessories that I may purchase?
Update: Edit: I was thinking of buying from impactguns.com or http://www.budsgunshop.com, anybody else purchased from here?
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