Tutorial - Blowback rubber band SMG 

Christian Hunt

There could be a number of things causing it. It's quite to diagnose without being able to see it myself. However its most likely the releaser being the wrong shape. check that when the spindle pushes back on the releaser that the releaser is actually catching the rotor and stopping it from spinning. If it isn't, try adding some material to that part of the releaser.

parabellum1262 thanks, ill try that!

parabellum1262 wat spindle

Yes, you can. Instead of cutting the bolt (pale wood) away for the brown thing, drill a hole for the pin instead.

parabellum1262 Thank you, greetings from germany :)

I won't be making a tutorial for the MAT-49, but this gun uses the exact same mechanism so you can replicate it yourself.

Thanks. I hope to make it.

7mm is fine.

Probably not, but I can't guarantee it.

Lol

That sounds likely. When the lever presses onto the releaser, it should allow the rotor to release one rubber band onto the lever.

I can't help unless it's specific. Try to observe and then describe what specific parts are doing.

TheUnHumanZone Theres no way to do that without modelling them yourself

Yes, you can.

Thank you and good luck!

Varnishing should always be the last step. Varnished wood won't stick very well. I glued that one part after varnishing because I wanted the side plate to be as smooth as possible but I used used screws and a special type of glue to hold it.

okay , i first glue then varnish , i hope be smooth and clear.

They are plastic because they need to be very strong. From your name, I am guessing you're Finnish. If that's the case, you'll be able to find birch plywood pretty easily which will be very strong. Cheap pine plywood might wear out quickly.

parabellum1262 yes he is from finland :) and i'm too. And birch plywood is pretty easy to get in Finland.

I cut 3mm long segments from 5mm aluminium pop rivets.

Thanks a lot. I'm thinking of making this, it looks really good! It's great that you provide free templates!

No, just make sure the parts made of hardwood are made of something tough.

Yes. Removing the magazine allows the action to be locked open for loading and inserting it unlocks it but that can be done with a manual latch instead.

@@parabellum_arms can it be done by manually pull back the bolt ?

@@fadlirobbia9000 Not really. Pulling the bolt back usually causes the action to slip and load too many shots.

@@parabellum_arms ok thank you

Probably. I used hardwood because I have plenty of it and certain parts should be stronger, but pine should still be okay for them.

i ask my q wrong sorry , i meen i want no use pine , use only hardwood for every part ? i dont like pine its to light

Sure, that's fine! I mainly use pine because it's easier to shape.

parabellum1262 thanks :)) i try with hard and send u picture when i done

Thanks! Always appreciated.

If you watched just 18 seconds of this video, you wouldn't have to ask.

i am gonna do one you just wait for the answer from me when it done

Thanks!

Jajajja

The problem is that the rotor is not spinning due to the releaser

It's pretty hard for me to troubleshoot remotely. If the rotor is not moving at all, you may need to file the vertical part of the uppermost corner that engages the rotor. File it away gradually until the rotor can slip past it and catch on the lowermost corner.

parabellum1262 ok thanks

and its need glue on the center or no ?

They should be about 30mm long and 2.8mm thick. If you use a 2.8mm bit to drill the holes, they will be tight and you won't need glue.

parabellum1262 okay , thanks , and last Q are u glue rottor on nail?

Again, the rotor should fit tightly but you can glue it if not.

hole on the ply wood same 2.8 bit. how rotated?

Here: www.scribd.com/document/322872005/Blowback-Rubber-Band-SMG And that's probably enough comments for one day :)

There are two in the video description.

Ok thanks

before you challenge others, preferably you need to prove yourself first.And please try not to use word"I dare you" especially when you asking someone to do something for you, it is so lame and provoked. And I know your real intention behind your words

He isnt asking him to do it for him. He legitimately just said " i dare you to try and make a shell ejecting blow back desert eagle. You must be blind to think that he want's it done for himself. Also you don't need to prove yourself to say " i dare you"

ㅇ

p90 model is quite hard to make.

i think so :u

너무 갖고싶다...

i agree. this parabellum fellow is a fool for not getting a patreon.

you have any idea how expensive that would be? he would have to put a lot of time and effort into creating these.

Surprisingly unprofitable. They would take too long to produce and the cost wouldn't be justifiable for the average consumer. Support him by buying plans, though! Super easy to make!

A more profitable middle ground would be skipping the cutting part by selling CNC or laser cut kits, ready to assemble. I mean, ordering ONE set cut is too expensive, but ordering a whole batch becomes much cheaper per set, allowing them to be sold at an actual profit.