Matt Hoover AKA CRS Firearms is a Internet Personality, 2nd Amendment Casuse Celebre, convicted felon, terminal cancer sufferer and absolute retard who looks like he sucks cock for meth at a truck stop.
For a long time Mr. Hoover was a business owner and moderately successful YouTuber. This all changed when he decided to start being really retarded and start advertising Illegal machineguns on his relatively popular YouTube channel with his face and name plastered all over it in a video that would eventually be seen by more than a million people. Mr. Hoover had been approached by an up and coming entrepreneur from Florida, a man running a business known as AutoKeyCard.com. AutoKeyCard.com was an online webstore that sold only a few products, the namesake Auto Key Card and T-shirts and stickers and whatnot relating to the eponymous Auto Key Card. What was an Auto Key Card?
This is an Auto Key Card
Now, you're probably wondering, what does this little metal card with a funny drawing on it have to do with Illegal machineguns?
Well for you to understand that we have to delve Into the intricacies of American Firearms Law.
In 1934 the National Firearms Act, among many other things, mandated a $200 tax be paid to the Treasury Department and an onerous registration process be undertaken by all persons except law enforcement or military entities (so essentially, all private citizens) wishing to Purchase a machinegun, which was defined as any firearm capable of firing more than one round with one pull of the trigger. The intent of this law was to artificially suppress sales of machineguns, as the purchase price of a Thompson submachinegun was $200 at the time
In 1986, A Democratic Representative from New Jersey, William Hughes inserted an amendment Into the text of the 1986 Firearm Owners Protection Act, whixh would be go on to be known with infamy in gun circles as the Hughes Amendment. The Hughes Amendment closed the machinegun registry, this means that from May 1986 onwards, no civllian could register new production machineguns, the amount of machineguns was essentially a fixed population.
Sometime before the 1986 ban (I can not find an exact date and cannot be bothered to look) a man named Maxwell Atchisson, who would later go on to invent the famous AA-12 Automatic shotgun, invented a small contraption consisting of two pieces of metal known as a Lightning Link, which despite not being a gun or firing bullets, was considered to be a Machinegun and to legally own one you had to rest register it with the ATF and pay a $200 tax on it.
Hey, now why's that look familiar?
Now, you're you're probably asking, but if the Lightning Link isn't a gun, how can it be a Machinegun?. Well, here's where we get into the silly, arbitrary world of ATF rule making powers. Many years ago when AR-15's where still a relatively rare thing on the civilian market, there were some very naughty boys who wanted their rifles to be fully automatic but didn't want to go to jail if the ATF came a knockin and very easily identified their illegally modified full auto rifle (Military AR-15 derivatives have a noticeable third pin above the safety selector and an AR-15 is considered a machinegun even if the hole is merely drilled with no other components installed) and developed a device to enable this. These were what we're know as Drop in Auto Sears (DIAS), which for a time were sold legally and illegally, you could drop them into your rifle, blast away, take the DIAS out, bury it in the woods and the ATF would be none the wiser unless the ATF caught you or people reported hearing full auto fire.
Now, the Lightning Link was operated in a similar manner to the DIAS, but only functioned with a specific style of AR-15 that came with a specific Bolt Carrier. For context, to work with conventional Auto Sears, Pin or Drop in, an AR-15 bolt carrier needs to have a specific geometry in order to activate the full auto trip.
The Colt Manufacturing Company produced and sold AR-15 rifles to the general public, but, due to a variety of reasons including military contracts and fear of the ATF, went above and beyond and among other things created the SP-1 bolt carrier profile, which had a large amount of material removed and would require extensive modifications to work with a conventional auto sear. The Lightning Link was designed specifically to function with an SP-1 bolt carrier and convert a rifle equipped with one into a machinegun. The SP-1 profile bolt carrier is very rare and obscure these days and have largely out of production for years (keep this in mind)
Now, the Lightning Link was a very niche product in it's time due to having a $200 tax and registration process on a $2 piece of metal, only about 700-900 were ever produced and sold legally, maybe a couple hundred more popped up over the years illegally, but it is by far the most obscure and least used way of the 5 methods to convert an AR-15 to full auto legally or Illegally
Anyway, back to the relatively recent past, the Auto Key Card Saga
Matt Hoover starts hawking Auto Key Cards, which if you haven't put 2 and 2 together now, are sheets of steel with the template for a Lightning Link laser engraved on it, and are explicitly advertised by Hoover, on his public YouTube channel, associated with his name and face, while being a licensed and registered Federal Firearms Lincesee (permission to deal in guns), as machinegun conversion devices.
Now, there's a lot of debate about whether the Auto Key Card is protected under 1st Amendment Grounds and some info came out at trial about how apparently that if you were to actually deemed out the Lightning Link sketched out on the card it would be dimensionally inaccurate and wouldn't function as a machinegun but regardless, it was an immensely retarded thing to do, Hoover went to Prison for a few years and was only let out on compassionate release because he has terminal cancer.
He did all of this for a few thousand bucks and a Louis Vutton handbag.
" Or would they be printing his name on t-shirts and blindly starting GoFundMes for him? Meanwhile, even the heckin' based pro-white contingent comes out with "Well, blacks may be violent, subhuman retards, but us white people need to take the heckin' higher ground 
".
