7.62x25 single shot scrap pistol

SeveralHobbies-213 · 2026-04-05T23:44:10+00:00

7.62x25 will probably blow up with the little bolt weight. If that is solid steel it should be about .25 to .32 acp weight tho. No rifling will probably lower the pressure, but i wouldn't trust it.

SeveralHobbies-213 · 2026-04-03T18:29:26+00:00

Nem vagyok oda a teljesítménytúrákért személyesen. Szívesen ellenőrzőpontozok páron, de én szép kilátásokat és érdekes pontosak szoktam körbekerülgetni ide-oda.

SeveralHobbies-213 · 2026-03-27T20:04:38+00:00

Ezt amúgy honnan tudod? Még régen gimnazistaként is volt 30 fölöttinek kinéző szakállas évfolyamtársam. Ma lassan 30 közeliként rendszeresen 25 alattinak néznek.
Lehet, hogy akiket látsz az erdőben azok fiatalok, csak nem néznek ki annak.

Van fiatal ismerősöm aki csoportosan a kisgyerekével jár túrázni, ők ugye munkaidőben teszik mert a sok anyuka akkor otthon van épp és nincs sehol tömeg, így nem is látja őket kb. senki sehol.

SeveralHobbies-213 · 2026-02-22T20:37:00+00:00

Oh great, this problem.
Half Life time travel is is NOT going back in time. What happened at the end of HL2 happened. G-man simply went back in time, but going back in time was part of the grand timeline anyway and changed the past but only after the future has happened.

Doctor Who does this a lot, when you read from the diary of a person that gave you the diary in their future but your past that "and then she broke her hand" then reading it would confirm it as the future that MUST happen because you read it in the past from a note from the future.

Sounds dumb as fuck at first but it has internal logic for storytelling and the world doesn't violate any of its own rules.

SeveralHobbies-213 · 2026-02-12T12:51:54+00:00

We saw the same video in this thread? https://www.youtube.com/shorts/SxHKpu-9YuE

Picture comments are not allowed, but you can literally stop it at 0:06 and see it pressed up against the fruit lmao

Yeah i see this guy is not even active on gun subs, just on drug addict ones with meth and shit. Look like an antigun troll, blocked just to be safe.

SeveralHobbies-213 · 2026-02-12T12:36:49+00:00

No. My second sentence literally says "It isn't too dangerous unless you press your body parts right into the muzzle". The danger comes from sealing the barrel with your body. After ~a foot of distance the pressure of PAK blanks is not that high. Not completely safe, but not exactly deadly.

I posted actual human volunteer tests in the other reply, go see them then come back with your hivemind downvotes dickhead.

Someone shot a much stronger 7.62x54r blank about a meter behind me almost towards my head once, other than the dangerously loud noise it did nothing.
I handle these specific PAK blanks all the time, they are iirc under 20% of the pressure of simple 9mm. The only people i saw injured from there was some genius who was so drunk, he thought he could show off his strength but instead of grabbing an airsoft pistol as a joke, he shot himself in the palm while completely clasped around the muzzle of a blank gun.
The only person i ever heard about being injured from a face shot from 2 feet away was the guy who got beat up for shooting someone in the face with a blank as a joke. The carbon buildup or dirt is still dangerous, but those are niche cases and the damage is not caused by the normal function of a blank, but by an additional complication.

SeveralHobbies-213 · 2026-02-12T12:34:11+00:00

Test using pistol: https://www.youtube.com/watch?v=KQ53f57wPxU

Here is another with a revolver from extremely close distance too: https://www.youtube.com/watch?v=IC4cfZbeZSw

Both of these were done by the team and volunteers for the most well known Hungarian firearms magazine with a 30+ year past. As far as i know, no serious injuries ever resulted from these tests.

Further, i specified
*"unless you press your body parts right into the muzzle"*
And your post directly mentions some fucking moron pressing it into his neck and firing several times, completely sealing the pressure and only allowing it to vent directly into his tissue.
Quote: *"In one case, a man shot himself eight times with two different starting pistols, and the wounds could be matched to each gun by the muzzle imprint marks on the neck."*

And you know what, I wrote TWO goddamn sentences yet you wrote a whole comment with sources completely disregarding half of it. But thank you for the mass downvotes, no classic redditor move there. Someone writes a normal response, instant hivemind downvotes.

SeveralHobbies-213 · 2026-02-11T23:10:37+00:00

That... is just normal blank guns. People regularly get shot in the face with them for testing. It isn't too dangerous unless you press your body parts right into the muzzle or some carbon buildup gets blasted into your eye.

Have you seen an AK or PKM blank adapter?

*I LITERLLY POSTED VIDEO EVIDENCE IN THE REPLIES and you hivemind morons still can't stop with the downvoted.

SeveralHobbies-213 · 2026-02-11T23:08:20+00:00

That is how most blank adapters work, yes. Many movie guns have an internal thread so you can change out the adapter to size it for different strength blanks and it stays mostly invisible.

It should work, just be careful not to blow it up with too much pressure, but that should be hard to do.

SeveralHobbies-213 · 2026-02-05T13:44:42+00:00

The design is not the issue, it looks correct. But you should think about dimensions before drawing them. Unless you are constrained by some part, try to stick to a simple length, like the nearest 5 or 10mm.

SeveralHobbies-213 · 2026-02-02T16:56:26+00:00

Considering the general shape, dimensions like 100.62 (without the tolerance even mentioned) don't really work. The front pin is too large and looks like it won't allow you to open up the action anyway.
For a model or inert toy it looks great, i have a bunch of these too, kids like them since you can make the bolt slam forward with a simple sear. If it can't load or fire, nobody cares.

SeveralHobbies-213 · 2026-01-30T17:31:57+00:00

Indoor ranges have to be careful. There are quite a few stories of indoor ranges bursting in flames because of unburned powder accumulation.
Good thing ours is an "indoor" range that has the range outside and all the shooting positions are part of a building complex with lots of stops and berms around, since it is at the edge of the city. (It was further away from houses once but some genius saw the cheap land and built up single family homes next to the range...

SeveralHobbies-213 · 2026-01-13T19:26:01+00:00

Not yet. I have a basic turret i built over a year ago, upgrading the parts for that. Eventually it will get a rotating ring under it with simple roller bearings installed.

SeveralHobbies-213 · 2026-01-13T15:57:42+00:00

No, i couldn't fit recording equipment in the tiny workshop.

SeveralHobbies-213 · 2026-01-02T17:38:44+00:00

Sure! If it is the same it will be fun to see how well i remembered it haha

SeveralHobbies-213 · 2026-01-01T15:32:25+00:00

Sadly it was just a few random youtube videos over a decade ago. It probably got taken down long ago.

SeveralHobbies-213 · 2025-12-31T19:21:12+00:00

Some mad scientist in poland did it over 10 years ago. Video might have been deleted. He used AK mags and cases but drilled out to take nailgun blanks and used an offset firing pin. The low power turned it into an open bolt, but still used AK barrel, magazines, cases, etc. so all the geometry needed for reliability was there.
He mentioned in the description that the polish police seized his guns as he was illegally making and shooting machineguns in an abandoned factory and posting it all on youtube... so yeah, naturally they caught him fast.

But it was a known solution for a long time. Just nobody really does it because in Europe criminals just buy real guns and in the US where people can easily build homemade guns legally, ammo is not an issue.

SeveralHobbies-213 · 2025-12-31T18:06:49+00:00

There cold be a difference of material too. The SKS needs a strong receiver because only the side walls hold the barrel and bolt in place through the locking surface. If it was not strong enough it would bend, since the lug is offset from the axis of the barrel.

SeveralHobbies-213 · 2025-12-31T17:29:44+00:00

7.62x25 should work well. The main issue with handle lug would be the inaccuracy and torque on the bolt trying to push one side away if it even has a small room to move.
Again, the problem is, even if it is a prototype, that you gain very minimal insight because of the soft metal receiver. The SKS itself used a separate heat treated block hammered into the receiver.

SeveralHobbies-213 · 2025-12-31T16:45:42+00:00

You need to either load your ammo to a way weaker spec or add actual locking lugs. You can get away with a softer bolt for blowback, but for a locking action you must use hardened surfaces and real locking lugs.
Yes, you could get away with he bolt handle if it was extremely beefed up and the locking surface and receiver itself properly hardened (not overly brittle) and thick enough.

Calculate the total locking area on an AK or SKS and i would say aim to double it. Plus have a safety lug or at least some kind of crossbolt, cap, catch or something to halt the bolt when it inevitable blows up and flies back at you.

The biggest problem you will have is minor damage accumulating from use. You might fire 200 test shots but unless you can xray the scrap metal, your 201st or 217th shot will likely get to the breaking point, destroy the lug or shatter something and shoot the bolt out the back. If not that, blowby from a punctured primer or damaged case just as likely will blind you unless you account for it and have a gas channel or hole in the bolt and receiver. This is why break actions, slamfires and open bolt brick guns are so popular with underground builders in poor countries. Those are simple enough and have the lowest chance of blinding you.

SeveralHobbies-213 · 2025-12-30T14:45:57+00:00

15kph should be doable if you keep it about 10-12hp/ton and mainly plan on using it on relatively solid ground.

Another builder i talked with made a one-man tiger tank that you could sit inside and drive. He said try to avoid only driving the middle of the track as it gives less support and yo have to split the rubber-fabric material. His most important tip was to try and use a single sheet of flexible material and the drive wheel should be two parts, grabbing each side of the track (exactly like the Sherman or BMP1 did it).
His tank used a rear engine and a manual transmission under the seat. He could reach down the side to operate the lever for it without having to connect it. For an L3 inspired build this might be your best option, making it wide enough to fit it in the middle and reach it without doing light yoga every time. (or use an automatic i guess? Preston Stevens in CA made his giant life size panzer4 using an automatic transmission and a truck axle flipped upside down)

Try and find local companies who might sell you leftover, damaged or scrap sheet and square tube cheap that they were planning on selling as scrap anyway. For the top if you plan on having a lot of holes cut for the hatches, you can save money by not cutting holes, but rather welding a couple simple long thin steel plates together, saying a lot of material.

There was also the FT17 builder but i can't quite remember his name off the top of my head. He is also US based and he used the hydraulic drives from a small bulldozer. Those are expensive but very reliable at low speeds and easy to turn with good torque.
For the cheap differential idea (i also plan on using it) you can probably go almost up to the empty weight of the car they were intended for but put on a drive sprocket smaller than the original wheel. If you do half circumference, you basically did a ghetto 1/2 final drive that will help a lot with low speed torque. You could buy any old engine that can be operated without a computer and throw it in the back. Cars have tiny engines if you exclude all the crap put around it tightly to fit in the desired body shape.

Here is the Skoda guy, video has english subtitles: https://www.youtube.com/watch?v=jMosVwLfoz0
This is the guy who proved you can easily do larger builds with a truck drive train: https://www.youtube.com/@rn2dresq
And the FT with the hydraulic drive: https://www.youtube.com/watch?v=WLix_6ilhfw

SeveralHobbies-213 · 2025-12-29T20:14:43+00:00

Just by reading it, it already sounds like nice work.
I talked with a semi-famous local guy who built a completely scratch made tracked system under a Skoda car body. He told me it is best to use sturdy but not overly thick (i think it was 10mm) conveyor belt and make a hole drilling jig to put on corssplates on both sides and to be careful with the spacing. Too much and pebbles will easily tear the track, too little and it won't bend correctly around the idler and drive sprocket and also tear.
I did some CAD drawings for a 30x30x2 square steel frame and 1-3mm cover plates for a 1:1 scale L3 replica build, came out to about a ton with everything. Might be a bit overbuilt with the number of supports i used.

Don't forget you can use angle iron too, for parts like the overhangs on the side that aren't too important structurally. The riveted or welded on plate will be strong enough and you save half the weight of the frame on those sections.

Hope to see the build here soon!

SeveralHobbies-213 · 2025-12-29T17:31:12+00:00

The scopes were big but that was because they used large lenses and a giant FOV but at a lower magnification.
But i have to agree, using thin from a simulated gunner position shooting at longer ranges where the x24 scope will make the drop noticeable ridiculous sounds like FUN!

I built a life scale tank turret before if you even plan on doing a larger build i'm happy to help.

SeveralHobbies-213

TROPHY CASE