So you might be considering a Cobratec OTF Knife? Before you purchase an OTF knife, it is important that you understand the laws in the state where you reside. Even though the Federal law still forbids the use of the mail (or Internet) to purchase OTF knives from another state, you can still physically travel to another state where it’s legal to sell to make your purchase.
Some states, for example, do not allow the sale of OTF knives but allow possession. So for example, if you live in Kansas and I sell from Missouri I won’t be able to sell you an OTF knife.
I 
don’t know how many times I was at a gun show lately and heard a customer ask if I could own one. My answer is it really simple, you can own them and carry them. As long as your not out there acting like a moron. Most people are responsible but the morons are still out there.
In conclusion
OTF laws are always changing and the general rule is if you are using your switchblade for legal purposes (defense, hunting, and survival), you don’t have anything to worry about. These laws were put in place to protect against violent crimes carried out using switchblades. OTFs are very easy to conceal and can be as deadly as a pistol at close range, so the laws passed by some states are understandable.