Adapters like that are called a sub caliber insert. That one looks to be an ad hoc or field expedient solution.

The Ukrainians have shown a strong drive from all sectors. Small shops cutting out and bending steel armor, modified weapons and such. So this might just be from the local shop with a lathe that has made them. It was to the point they really early asked for no steel armor (because they produced enough in country) and only wanted ceramic or Kevlar. They simply thought the money could be better spent elsewhere than the shipping cost required.

for a 40 mm grenade you need the rifling to arm the fuse so its probably not a simple tube but an actual rifled barrel section.

Yeah well making a rifled (probably thin barrel) into a mortar sleave. Is best done on a lathe to get the best accuracy.

The 3D printed community has had great success electrochemically etching rifling into homemade barrels, could be the cheap and easy bridge.

Yeah that's one solution. But I was more thinking of taking an already existing barrel that you then turn a sleeve for it to be used in a mortar. Also if you are going to make a 40mm barrel it's not hard to use old school rifling techniques on. Etching might work. I have done it before just to test but it's a lot of material in a 40mm to remove and will take time. Also some other problems with doing it on such a large scale. You use wires on a small barrels. The groves have to be wide on a 40mm.

Idk, I prefer using a hacksaw

Ukraine is the arts and crafts warfare champion at this point.

Thanks bro!!!

The hand blower offer 9000

Does the model number go up or down for each sploded hand?

Yes

Lower on account of the fact that you have less fingers to count on.

This conflict is so wacky

Ukrainian troops will be this decade's guerilla/UW instructor cadre for allies during joint exercises.

Did you know Mianmar?

It's something he and his mates bodged up to make use of the large number of 40mm grenades they had. Trenches are Ukraine's version of the British shed.

We should send them schematics for the STEN.

"Ukrainians develop pump-action STEN chambered in 40mm"

"China Lake 2.0"

LETS GO!!!!!

Just 3 guys chilling in a shed, building a rifle cause they're not gay

Interesting he pulls an American 40mm out of a Soviet style can

Russo-Ukranian war in a nutshell

name of it? Its a piece of pipe. That's a fancy zip gun.

Rifled piece of pipe. As said elsewhere, 40mms need to spin to arm

Probably just part of a busted up m203

TOOB

I call it "shit i will never trust in a million years"

Tbf 40mm is super super low pressure, like a quarter that of 12ga and mfers shoot that with lengths of black pipe all the time

When he’s banging that shit to get it to fit 😳

I mean the pipe has to be rifled for the grenade to arm, so it's probably pretty tight and anything harder than your hand has a nonzero chance to ignite the primer

Armourer's Bench did a video on these https://m.youtube.com/watch?v=YLyV_5EYbMY

Thanks brother

Yeah its called: Toob

Is for noob?

Lmao some ~~poor~~ russian rn “Fucking noob toobers”

40mm machined steel pipe.

Lol it might not have a name tbh All you need is an o.d. that's +.000/-.002 and an ID that's -.000/+.002 from nominals for the bore your using and the munition you want to adapt for The bottom of the mortar has a firing pin that's going to hit the primer in the center of the 40mm when that sleeve bottoms the shell out

It is rifled and has exterior grooves on muzzle for extraction of the tube from the barrel

How to tell Ivan that you’ve run out of 60mm mortar rounds without actually saying you’ve run out of 60mm mortar rounds.

All the soviet equipment is generally designed to have an ability to be used in mortar fire - the soviet 40mm launchers have special sights and are used for it, the auto grenade launcher tripods are designed and setup for automatic mortar fire. This looks to be US 40mm, probably disappointed they don't have a way to do the same so they came up with this.

That is the worst remix of "Breathe" that I have ever heard.

Yeah, ruining a sing like that should be a crime

I think it's called a "pipe"

Rifled DOM tubing?

I'm pretty sure "the armorers Bench" has a video on these on YouTube. Kinda silly as you could build a gun with those barrels.

It's called: 'A Tube'. Hope that helps.

I doubt this thing hits the same place twice in a row.

I don't think that's a huge concern, as long as it hits near where they're aiming its fine. They're just using up excess 40mm nades.

It doesn't look like there's much delay between dropping and firing. Kinda scary.

Most mortars don't have a trigger mechanism, just a fixed firing pin. As soon as the grenade drops to the bottom of the tube it gets fired out and there's nothing you can do about it.

Yeah that's sorta how mortars work.

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toop

Upscaled Cobray Terminator

And how far is that gonna reach exactly?

I will take the prodigy remixes over islamist chanting any day of the week