A really excellent video from 1969 following Master Gunsmith Wallace Gusler as he builds a flintlock rifle from start to finish using traditional tools and techniques: https://www.youtube.com/watch?v=qTy3uQFsirk Seeing someone make their own screws using only hand tools makes you realize just how mu...

Does anyone have more information regarding the slot in the piston or its function? I am assuming the piston is not using a standard o-ring, rather a cup seal? Do you mean this one? https://i.imgur.com/te9WWc8.jpg If so, that allows a standard o-ring to serve the same function as a cup seal. When g...

I keep forgetting that you have the constraint of an urban area for testing :D The only thing that doesn't convince me is that the "skirt" of the pellet is "welded" to the target plate, it doesn't pass, only the "head" of the pellet passes to the other side... look at the photo I remember a similar ...

hectmarr wrote: ↑

Wed Aug 10, 2022 9:07 am

CHEAP, UGLY AND FUNCTIONAL!

There is a caveat in that "pretty is as pretty does", so when something is functional, there is a certain beauty in it regardless of its aesthetic attributes.

Dembouz921 wrote: ↑

Fri Jul 29, 2022 1:14 pm

I should also find a way to modify preset to delivers hundreds of bars since paintball tanks are cheap.

You can get a bit more pressure by adding more shims to the regulator main spring to increase the precompression:

Bazooka wrote: ↑

Sat Jul 30, 2022 2:15 am

It's dirty, fast and WORKS

It used to be that we heard this attitude from North American users while efficiency was more of a European thing, how the tables have turned

I can pierce 0,7 mm sheet steel

That's quite impressive for lead pellets to be honest.

Have you tried with more than two layers of foil?

https://youtu.be/2B2ZEN2Qu-Q Quite an interesting achievement but they really need to optimize the projectiles. The velocities they are getting are in the 200 feet per second range which is more arrow than airgun territory, although admittedly that's with projectiles five times heavier than your typ...

I'd buy a high-end PCP airgun and swap the barrel with a smooth one for BBs Honestly that sounds like a sensible solution, and it doesn't even need to be a high end gun. My understanding is that you need to fire a 0.177” steel BB into the gelatin at a velocity of 590 +/- 15 feet per second, I would...

Very interesting work!

I love the "spade grip", reminds me of a friend's post-apocalyptic (airsoft!) RPK:

Du très beau travail réalisé avec des matériaux "over the counter" et sans outils spécialisés, very good job!

I bet you could up the pressure even more but even as it is you're getting very respectable power and shot count.

I remember proposing this sort of test a long time ago :D That was very fun to watch, I'm amazed by how much pressure it took to actually burst a lot of the PVC, although that of course is no endorsement to exceed the working pressures recommended by the manufacturers. It also makes the point that e...

Moonbogg wrote: ↑

Mon Jul 25, 2022 9:44 pm

I will either leave to my kids or force the kids to bury me with the cannons, not sure which yet.

The latter would be an interesting discovery for future archeologists in the former case they could be used to distribute your ashes

Take a look at this thread, plenty of examples on the same concept.

wyz2285 wrote: ↑

Wed Jul 13, 2022 3:19 pm

it's good to see the forum is still alive and you're still here Jack!

Well, sort-of and glad to see you're still around too!