Read it carefully.
"571.020. 1. A person commits a crime if such person knowingly possesses, manufactures, transports, repairs, or sells:
(7) A switchblade knife;
(9) Knuckles.
a crime pursuant to subdivision (7)...or (9)...is a class A misdemeanor."
So no felonies for possession, but it's not really legal and I'm sure a huge hassle if you are caught.
But maybe, just maybe some automatics are legal, and here's how. Read section
571-010, it's just a list of legal definitions.
Definitions are important because they define the objects the laws are talking about, and what Missouri law defines as a "knife" actually excludes what you and I would commonly call a knife. In fact, what Missouri excludes as a knife includes my entire collection! This is all important because the Missouri definition of a "switchblade knife" relies upon the definition of a "knife" first and foremost as the primary definition of a switchblade knife. Let's read.
"571.010. As used in this chapter, the following terms shall mean:"
Ok, so first off we're just saying that this section defines the terms used in the following sections, this of course includes section 571.020, which is where Missouri has outlawed the dangerous "switchblade knife". Let's learn what a "knife" is.
(12) "Knife", any dagger, dirk, stiletto, or bladed hand instrument that is readily capable of inflicting serious physical injury or death by cutting or stabbing a person. For purposes of this chapter, "knife" does not include any ordinary pocketknife with no blade more than four inches in length;
Ok, seems pretty simple, the first sentence lays it out, "knife" is pretty much anything sharp you hold in your hand. I guess if you wanted to inlay knives into the tips of your boots and bootstab your friends you're pretty much cool. At this point I'd like to remind you
I AM NOT A LAWYER. Back to topic, the second sentence is interesting and somewhat hard to read, let's look at it by itself.
"knife does not include any ordinary pocketknife with no blade more than four inches in length"
....! I hate double-negatives, what the shit does that mean? Let's try removing the negative statements to make it understandable.
"knife does include any ordinary pocketknife with a blade more than four inches in length"
Oh, now that's simple! A knife is now something with a blade longer than four inches! Of course that's not really what the law says. Let's try just removing one of the negatives.
"knife does not include any ordinary pocketknife with a blade more than four inches in length"
Ok, I understand that, an ordinary pocketknife with a blade longer than four inches is not a "knife". Perhaps they were planning separate legislation just for folding swords, I don't know. Of course we're just playing word games again,
this isn't actually what the law says, and would you really expect the law would state that a blade longer than four inches is just an ordinary pocketknife? (you say "no" here).
The law actually says "no blade more than four inches in length". They're looking for the opposite of "blade more than four inches of length.
So it's fair to surmise that a "knife" does not include pocketknives with blades less than four inches. I just wish I had a definition of "ordinary pocketknife". The only thing the legal definitions give us on that is telling us it's not a "knife" and has a blade less than four inches. I'm guessing it must also fit in a pocket, and be ordinary. You guys with the fancy damascus blades don't count.
.... ..., you have too much money anyway so just buy yourself out of trouble Mmmmkay.
GOD YOU ARE BORING. Why the hell does this matter anyway?
Quickly now, let's look at the definition for switchblade knife.
"(20) "Switchblade knife", any knife which has a blade that folds or closes into the handle or sheath, and:
(a) That opens automatically by pressure applied to a button or other device located on the handle; or
(b) That opens or releases from the handle or sheath by the force of gravity or by the application of centrifugal force.
Wait, what?
"Switchblade knife, any knife which has a blade that folds or closes into the handle or sheath, and..."
Ok, I know it's been a long time, but what is a knife again? Actually, who cares?! What is NOT a knife? A pocketknife with a blade less than four inches! They've explicitly told us that. It doesn't matter what the second two conditions are if we don't meet the first!
Does this mean your pocketknife is legal in Missouri if it's automatic and under four inches? I'M NOT A ....... LAWYER, but it seems it could be so. I think it depends on if your pocketknife with blade less than four inches is "ordinary", which as a legal term is not defined and patently ambiguous.
So what will happen if you are caught with your automatic pocketnife less than four inches? Well, they will take it away, you will have to go to court, and you will lose your case because you were so silly as to believe the law might work in your favor. Maybe you'd get it on appeal, and won't that be wonderful! Just think, after spending untold tens of thousands of dollars you can finally hold and carry your $200 automatic (and ordinary) pocketknife.