Caramba, tão esquecida que nem nós brasileiros sabíamos!

A drop safety, an auto-sear, and select fire, in a stamped steel, 7 piece subgun. That's Engineering folks. The design of the intertial drop safety alone is impressive, but the sear/trigger is crazy.

it´s a rare gun even in Brazil, after 13 years in police service I never saw one!

Even in its extreme simplicity, this gun seems like a swiss watch compared to some things that are produced today in Brazil. Thanks Ian, for shining some light in this project. This gun seem so forgotten that it probably remains in obscurity even for brazilians. I was thinking that my father could have been issued or at least have handled one of these, since he served in the military and was a police officer right in the production time of this gun. But, after a short search, I discovered the reason for this gun's obscurity, it has a pretty hazy and infamous history. The military apparently rejected this gun some time after its adoption, for considering it unsafe and also because they wanted it to have a slower rate of fire. Seems that Olympio was an ex-military engineer and was producing this gun in a small shed under the name of "Mekanika Indústria e Comércio" in exclusivity for the military, and was hoping to get more law enforcement contracts in the future. Sadly, after the military rejected the gun, his company went in bankruptcy in 1984 and Olympio died shortly after it, in 1986. This is the part were the history gets really confusing. Apparently, the production numbers of this gun were something around 8.000, but the military only acquired 850 and the rest of the production was stored under the custody of a major gun company called Imbel. Somehow, a large number of this guns (more than 2.000) have then broke into the black market and ended up in the hands of criminals, becoming especially known for being used by bank robbers and other gang criminals. Apparently, the extremely simple project of the gun became sort of a template and inspiration for inumerous clandestine manufacturers of criminal guns since then, with the police having seized various guns and gun projects in different calibers with basis in the Uru. A pretty unfortunate story for an otherwise promising gun.

As a policeman myself I only ever met one guy who claimed to have shot with one, a professor of forensics in the police academy. He was a professional marksman for decades and got his hands on one at one point of his life. He spoke very highly of it in comparison to the 40 caliber models used today. He said it felt very "smooth" and easy to control during shooting, while also being very reliable due to its simplicity of design, saying that he never got a single problem while shooting it. I remember him saying that anyone with decent knowledge of firearms could easily create an uru in a machine shop, and after seeing this video, I believe him completely. Sadly I haven't found any shooting videos of it yet.

My grandfather made this gun, i never met him, but i know he was ahead of his time.Unfortunatly he died of lung cancer due to heavy smoking. If you google him you can see he was always with a cigarrete on his hands. If he was alive today, i believe he would be doing great things, not only guns. He loved nature thats why he gave this gun the name of a bird. (Uirapuru / Uru) Thank you Ian for keeping this memory of my grandfather alive. 🇧🇷

A genius design in it's simplicity, I would imagine if made from good materials it would be reliable and durable. Complicated designs get all the attention but I think it takes just as much if not more engineering skill to make it simple.

That fire control group is impressive. “Spartan elegance” so to speak. Incorporating a select fire mechanism into a gun with three moving parts is incredible

I feel proud to see a Brazilian weapon being analyzed and even being praised by such a prestigious specialist. And especially from a developed country. Thank you Ian.

I'm a Brazilian Air Force soldier, I've seen some of these weapons in the sotrage before, but didn't knew what it was until now... It's a nice weapon.

Cheap, simple, and effective. All important traits for a submachine gun. Also the safety mechanism on this gun is an incredibly clever design.

The engineer that designed this is a freaking genius.

I love seeing SMG mechanisms. The simpler the better.

0:48 i'm glad you know we don't speak spanish but portuguese. Greatings from Brazil.

That makes the Kalashnikov design seem complicated, ha. I have never seen a trigger system like that before. Also, what a cleaver drop safety. I wish we did not have silly illegal laws as I am sure a small start up company could produce these in the states for abou $100, ha.

Oh wow, I never thought I'd see a gun from my country in here.

This is so beautifully simple.

Shit, looks simple enough to build in your garage.

very impressive surprised this isn't in any fps game

This is a perfect example as to why I absolutely love tubular-based submachine guns. They're simple & straight-forward in their designs.

The "Mtr." stands for metralhadora, which is Portuguese for machine gun (sub or otherwise). Thanks for the great video!

the selector switch and safety are genius in their simplicity, great firearm design

Hello Ian, I don't know if I got it wrong, but the "Mtr." stamped on the receiver is the abbreviation for "Metralhadora", machine gun in Portuguese, and not "Manufactured" sorry if I'm wrong and about my English!

I am a 29 year old police officer (investigator) in the State of São Paulo, Brazil and the few times I have seen this national weapon was in the hands of bad guys. Tanks for the video

Look at that gorgeous piece of machinery.

Man i am from Brazil and i didn't even knew that we actually had a submachine gun produced here. Awesome vídeo and thank you for this! The engineering on this project is just amazing. Best regards from Brazil.

Wow... I am thoroughly impressed by how crude, yet awesome that little thing is!

Absolutely floored by its simplicity. Select fire capability with nothing more than a trigger and a selector switch!

simple but very well engineered, the designer knew what he was doing !

I love this gun! Elegant design.

This is impresively simple

This is my favorite FW episode.. Making something this simple is very complicated and awesome.

Thanks from Brazil 🇧🇷!!!Muito obrigado!!

that drop safety is genius

More brazilian guns please

WOW, just wow... What an amazing piece of engineering. It oozes of being maufactired in a shed with little to no machining tool..! Perfect demonstration Ian :)

My father and I have a friend police officer, Subtenente Silva, who usually used this old SMG even in 90's and 2000's years, this video remember him, RIP.

It's so simple, it's beautiful.

I was doing some mental gymnastics the other day, and I’m so glad to see the wonky trigger assembly I was imagining works in practice! I totally wrote it off at the time thinking “nahhhhhh, that’s probably not how it’s done for a reason I’m not thinking of.” Turns out it just works™️

1:10 love the simplicity of its construction, great stuff!

I am a cop in brazil. Amazing that some police forces still use it down here. Jams a lot but does the job.

When you can't pay for tools, make a gun that doesn't use any!

I wanted to know just how simple an SMG could get, seems like my long quest is at an end...

I don't think I'll ever stop being impressed by the sheer ingenuity of gun designers.

As always, a brilliant take down and insightful reveal of the innards.

I would love to see a video on single feed vs double feed magazines.

UrU what's this?

Incrivelmente simples e simplesmente incrivel... Incredibly simple and simply incredible...

Well well well, after many, many videos I'm surprised to see Gun Jesus handling something from my country. Glad to see it. Thanks, Ian!

This was another interesting one that I hadn't heard of before, Ian. That looks like it would be probably well liked and very reliable for military and police use, especially in mostly hot and sometimes even jungle-like terrain. The minimal parts would also greatly help in the field, so troops and police have little or no small parts to lose.

Hello. I'm Brazilian, and it's great to see a brazilian gun in the channel. I really enjoyed.

I am impressed. Almost as simple as the gevarm smg

Esse vídeo caiu de para quedas pra mim. Nem sabia da existência dessa arma.

O percursor fixo lembra a submetralhadora Beretta também usada no Brasil! Lembrando que na época o Brasil não importava tecnologia, então fora desenvolvida aqui mesmo. Como outros tantos equipamentos (desde tanques de guerra até computadores)

A very clever design! Very very interesting!

I love this thing... It's so easily understood and because of that I can appreciate the brilliance of simple engineering.

FInalmente uma arma brasileira! Ótimo video como sempre Ian! ^^

There's "simple" and then there's "baffling-ly simple."

would love to see this design modernized

say hello to Brazil! abraços!!!

Da orgulho de ver! Muito bom!

Another clever feature is that extended magazine well... which (IMO) can act as a fore-grip, and minimize feed issues with the magazine. (That's why British soldiers were trained / discouraged from grabbing the mag on a STEN... the chief reason for it jamming.)

I envy your life. Thanks for the obscure history. Been a follower for four years now and still learning!

I have to thank you, for do some light on this old and forgotten gun. KZfaq recomend this for me also.

Damn I can see a few different guns within this

It's not whether or not you can pass the NFA background check (that's the easy part), it's whether or not you can pass the wallet check. :-)

From time to time I come back to this video just to admire the engineering. Beautiful.

That recoil spring/guide, it's "biscuit" stopper and the slot in the top of the bolt to accommodate the recoil spring assembly, and its stopper looks surprisingly like the same parts on a Browning Buckmark.... almost identical in design.

Gun Jesus please come to Brazil

Probably a dumb question, but... On that drop safety, why couldn't you build it so that the sear engages before the bolt travels far enough back to chamber a cartridge? Possibly some sort of a ratchet system where the bolt has to come all the way back before it can go forward?

Eu que sou brasileiro nem sabia que essa arma existia (I'm Brazilian and I didn't even know this gun existed) Thanks for show this awesome submachine gun to us.

I love this gun, everything about it. Its like a newer version of the grease gun, super simple and cheap to make but works beautifully.

here in Brazil we have a word for this kind of thing, its called a gambiarra. A brazilian expression. It basically means to use improvised methods / solutions to solve a problem, with any avaiable material. English equivalents would include "McGyverism", "Kludge","Quick Fix", "Alternative Engineering", "Workaround", and so on.

I'm going to hate myself for this but... "URU WHATS THIS :3"

Nice and simple. Thanks for the interesting video.

Nice video!!! I like Brazil's guns, for exemple Imbel IA2 and CBC 12 Pump.

great info

That is a quite cool SMG mechanism!

Most impressive - thanks for sharing!!

its very calming hearing you talk about guns.

It's beautiful. Lets start the bidding at $5.

Start making some phone calls, I want to see you putting some rounds through this

I'm so happy to see a gun from my country on your channel

This is really great & simple design!

Look like a crazy Tec-9

Maybe this is naive, bit this gun looks so similar, simple, and intuitive that I suspect any paintball player familiar with a mechanical like a Spyder could probably maintain it without a manual.

Nice to see a brazilian firearm here... I never heard of this one, but it seems to be a sweet to shoot. At first, it really seems like a MAT 49 or something. Well, I'm glad you did a review on this one, Ian! Cheers from Brazil!

He doesn't care about how you look on the outside, but he only cares about the inside. Ian is a love gUru.

*Notices Submachine gun* URU what's this?

great video !

I have a 1908 Brazilian Mauser (Crest on receiver) made by FN - Herstal in Belgium. I had it sporterized to 30-06 with a Boyd Stock and Shilen barrel. I also have a Browning, Hi-Power made for the Brazilian Police also by FN - Herstal in Belgium. I am very proud of the craftmanship of both these weapons. Wish I had a Brazilian Uru SMG if only to try shooting!

I watch these over and over again.. Just fascinating

This looks super cheap to produce. Probably one of those guns that just works.

I worked with uru in PMPI in 2005. The security system of this weapon is very dangerous.

There is so much beauty in functional minimalism.

I was waiting for this video so long!

Hey Ian, I have been wondering how often you get time to practice taking down the guns before you film. While this gun obviously doesn't need much practice, you seem to often know off the top of your head how they come apart. Is it just a mix of research before hand, and just looking at the gun? As always, great videos! Here and on Inrange!

2:44 "Manufacture Uru" not, Mtr. stands for "metralhadora" or burst-fire gun.

the uru shots .22LR too, for trainning. good machine

Great video!