A recent Brazilian DIY full-auto pistol

Just like many countries around the world, Brazil also has its share of illegal guns being seized by police authorities, some of which have occasionally been shown in TFB and, even more often, in Impro Guns (https://homemadeguns.wordpress.com/).  This example was recently found in Minas Gerais State, a habitual source of DIY weaponry.

.380ACP pistol with large-capacity magazine.

The pistol shown above, chambered to the .380ACP round, has an unusually decent overall finish and came with a very large capacity (30-round +?) box magazine. The tubular receiver extends to a muzzle area extension made of a brass-like material. The magazine housing just ahead of the trigger guard is a box-like structure, the ejection port being vertically-located there. Since no fire-selector or applied safety devices are visible, it would seem that the contrivance is a full-auto-only gun (confirmed in one of the videos), as it’s often the case with such DIYs. Sights? Who needs them?

The video below was made by PMMG – Polícia Militar de Minas Gerais (Minas Gerais Military Police) when the gun was seized:

A second video has been obtained by TFB, and this apparently shows the full-auto pistol being (very informally, indeed!) tested on an old mattress by probable designer/maker/user prior to falling into the hands of Law. The magazine was filled with ten rounds of .380ACP ammunition, which were subsequently fired in a single burst with a (expected) very high rate of fire. And when I say “fire”, I mean it…

Ronaldo Olive

Ronaldo is a long-time (starting in the 1960s) Brazilian writer on aviation, military, LE, and gun subjects, with articles published in local and international (UK, Switzerland, and U.S.) periodicals. His vast experience has made him a frequent guest lecturer and instructor in Brazil’s armed and police forces.


  • EdgyTrumpet

    That mattress suppressor is flawless.

    • CountryBoy

      What a cushy job he has!

    • Dean_R

      High tech Brazilian ballistics forensics laboratory!

  • b0x3r0ck

    If this was South Korea this would have been a video about blaming American YouTube host for corrupting there “honorable” youth.

  • Silly Rabbit

    Perhaps someone should sell a muzzle atachment that allows you to attach a mattress to the end of your firearm a bit like the old .22 oilc can job. It looks perfect to me!

  • noob

    The Iron Law of Prohibition was a concept that the stiffer the penalties there are for the prohibited item, the smaller, easier to produce and more potent the product becomes.

    Observed in the 1920s and 1930s, bootleggers would quickly notice that they’d get the same sentence for being caught with beer as they would with bathtub gin. So they concentrated on the hard liquor so they could easily hide a smaller bottle with the same amount of potential sales in it, or hide the same amount volume for more potential sales.

    Cheap and nasty blowback subguns are this principle playing out in firearms.

    If you want craft beer you gotta decriminalize. Otherwise you end up with meth and bath salts.

    • Nicks87

      I just think it’s funny that the same people who fight for our gun rights want stiffer penalties for drug possession and use. Isn’t it the same line of reasoning? Drugs and guns are both capable of destroying lives but can be really fun if used responsibly by adults.

      • Wow!

        Several things. First look at why the Founding fathers made weapons a right and did not make narcotics a right even though prohibition was a hot topic then too. A free country is only maintained by those who are armed and clear thinking vs those who are impaired. ALL people need weapons to defend themselves, but few need drugs to survive.

        A gun can counter other guns in self defense. However narcotics never stop drug abuse. Additionally, while the concept of combat can be easily understood by the layman, the layman does not have the medical knowledge to use prescription drugs appropriately, and many “remedies” are well known by research to not be worth the side effects when other less-invasive treatment options exist.

        Will cartels exist when drugs are outlawed? Sure. Will they disappear when drugs are legalized? No! This is a common mistake. Repealing prohibition didn’t stop the gangsters, it was a reformation in law enforcement where LEA’s started sharing information and looking for broader inter city patterns to hunt down the criminals more effectively.

        We must enforce the law and stop criminals. While legalizing may by default cause less record of crime, the act still exists. Afterall, if Chicago has a murder problem is legalization of murder the solution? The reason we are against gun laws isn’t because we believe that legalizing by default stops crime, but because the SUPREME LAW of the land already says that the right to keep and bear arms shall not be infringed.

        • Heather Cross

          The Second Amendment is enumerated as a natural right, it wasn’t granted to us. The drafters knew it and included it because it was necessary against tyranny.

          But the people have allowed egregious laws to be passed that restrict our right. These unconstitutional restrictions all need to be stamped out forever.

        • Frank Earl

          Your reasoning is flawed.

          Without a prohibition, there wasn’t any gangsters in the normal sense.

          Prohibition MADE them as powerful as they were. Saying that they didn’t go away when you removed Prohibition is poor reasoning at best and trying to sell something at worst. I wonder which is it we’re talking about in YOUR case.

          • Wow!

            Gangsters did exist prior to prohibition. This is another common mistake that people have due to years of liberals ignoring parts of history. Gangs sprouted from immigrant communities which were not active in assimilating with the American culture. As an example, note how the Japanese rarely were involved with organized crime, because they actually formed associations garnered towards learning the customs, speech, an rules of America. In contrast, the Italians wanted to be italians, and the Mexicans wanted to be Mexicans, the Chinese wanted to be Chinese, the Native Indians wanted to be Indians, etc. Which is why all those groups had organized crime syndicates that still exist to this day. Remember, crime is a business, prohibition was an opportunity, but not a cause. After prohibition they simply moved on to robberies, which continued the crime spree until the LEA’s modernized our information networks and targeting analysts.

            Heather Cross, you are right. 2A is about fighting defense against an out of control government or faction, foreign or domestic. It is not about hunting or shooting sports. That said, truly, there is no such thing as a “natural right”. “Rights” are a construct of society. In the animal world the Rabbit cannot sue the Owl for eating him. This is why the founding fathers wrote in the Constitution that the powers of the government come from the Constitution which also establishes rights. The government is a construct of society, whose powers are given from the same document that dictates the rights of the people. When the government violates its own laws, it simultaneously degrades it’s own authority. Of course that authority truly never goes away until the people fight against it. This is why I remind people that violating illegal gun restrictions is truly the only way to fight gun control. Criminals like marijuana users have violated the law for decades and because they violated the law now they are getting people like Frank who rally to their cause in order to stop their violence and crime. In a lot of ways it is like softcore terrorism. Convincing people by fear, rather than logic. Of course, we do not have to convince by violence against anyone except the criminals who seek to harm us when we defend ourselves.

  • Stuki Moi

    What noob said.

    And also, if anyone bothered to give those guys some proper training, they’d quickly realize that for a lone guy who has to obtain and carry all his ammunition on his own, aimed semi automatic fire trumps rock’n’roll for 99% of practical uses…..

    • RocketScientist

      While that may be true, it is DEAD-NUTS simple to build a fixed-firing-pin open bolt direct-blowback full-auto-only subgun. It is considerably more complicated to design/build a semi-auto firearm.

      • Stuki Moi

        But is it, in Brazil, for a criminal not concerned about gun laws, easier to build a functional subgun, than buy a functional semi? It’s not like there’s some complete drought of semis in circulation there. But I realize I do perhaps travel in different circles, than the target market for these things…

    • iksnilol

      It’s much easier to build full auto sub guns.

      And in the case of gangsters like that the gun will most likely be used to dump a mag into somebody (IE drive by) or behind you whilst fleeing.

  • John

    What do you know, criminals will always find a way.

    • DanGoodShot

      Who knew

  • marathag

    ATF sees this, all mattresses will be treated as silencers.

    • USMC03Vet

      8 month wait on the Temperedic! 4 the childrens of course.

      • CountryBoy

        Plus, double the NFA fees, since it will handle two adults at once!

        • noob

          On the upside, New York and LA will never ban “high capacity mattresses”. They like their watersports too much.

  • marathag

    Also, no failures to feed, at 1500? rpm
    If only Taurus could build as well

    • ozzallos .

      You would have to drop it to get those features.

    • MysteryMan

      Oh come on 🙂 … my 25 year old PT99 is a little loose but it’s never failed to fire :).

  • DanGoodShot

    I just lost enough time trying to figure out how in the world that very smooth, long, single stack mag STAYS in the gun as I couldn’t find a mag catch on the mag or a mag release anywhere… anyone else have an idea? I’d love to know.
    Other than that, I gotta say. Nice job for DIYer!

    • AD

      Good question. Friction fit? Hard to believe it wouldn’t slip out of alignment while bucking under recoil in that case.

    • USMC03Vet

      Probably the power of favela.

      • DanGoodShot


    • DIR911911 .

      watch the first video there is a small hole near the top of the mag on one of the narrow sides @00:25 the mag release must be inside the trigger guard , on the second video you definitely hear it click into place

  • Colonel K

    Why? Because you can never waste ammo fast enough. It had to be said.

  • BraveNewWhirled

    A couple minor mods and you have a fantastic laser-blaster.

  • Donald Darr

    The MAC in 380 had a fire rate of 1,380 which makes this one crazy fast. You can come up with all the laws you want and the only people that suffer are the law abiding.

  • Ryfyle

    There getting real good at making SMG. I really hope that barrel was rifled.

  • White Knight Leo

    That is a ludicrous ROF.