Sounds like total nonsense, I can walk into a California gun store and buy the same guns they're selling in Texas, not to mention it also borders Mexico [1]
Operation Fast and Furious, the operation that saw the US government arm the cartels, was based out of Arizona.
Now we can talk about Fast and Furious and how dumb it was (So dumb) but acting like Texas and California are same when it comes to gun laws is just wrong.