smg762 said:

If one applied the 85-100k pressures to , say, a .220 swift, what would the result be....could it reach NGSW energies?

Channeling 3600 J of KE in a .22" barrel would be interesting, for sure (75 gr VLD at >1200 m/s, seems it could be done at 90 kpsi in a 28" barrel, at least for one shot, maybe two).

And as we can see, the bolt carrier only travels far enough rearward for the rammer to align with the base of the next cartridge.

The tkb-022pm wasn't an AK prototype and no it's not a rising chamber Design.

It uses a falling breechblock and rammer design which is very ingenious.

Max actually has a YouTube video with a very accurate 3d model of it's internal workings.

The gun is pure genius in so many ways though not particularly practical or large scale producible.

roguetechie said:

The gun is pure genius in so many ways though not particularly practical or large scale producible.

I've always thought it was the solution to all the issues with a bullpup, but it is just a little too complex to be soldier proof. I imagine now it could be made cost effectively with CNCs and investment casting but even so that would be the only issue in it's way - beyond the unnatural bias against bullpups. 

Red7272 said:

I've always thought it was the solution to all the issues with a bullpup

I'm curious how you reached that conclusion.  Have you handled or fired one?   Because it looks to me like the TKB-022 has most of the usual bullpup issues (e.g., poor balance and handling, excessive length of pull, etc.) and more.

With the extreme rearward location of the magazine, weapon handling and mag changes while wearing body armor and load bearing gear seem likely to be problematical.

stancrist said:

With the extreme rearward location of the magazine, weapon handling and mag changes while wearing body armor and load bearing gear seem likely to be problematical.

So moved the controls back and add a 20 cm telescoping butt. all the issues with a bullpup solved. 

The current world record for .22s is only about 2300 ft lbs. Step up to 6mm and the record was 3500lbs....from the 243 H&H magnum.   The main proble  would be throat wear. Thats why i think you could add tiny bore-riding fins onto the bearing surface of a .22. Briging it up to 6mm...

With polygonal or radial rifling, the fins might be viable.

Red7272 said:

So moved the controls back and add a 20 cm telescoping butt. all the issues with a bullpup solved.

The way the control group is attached to the barrel, it looks to me like the controls cannot be moved back even 1 cm, let alone 20.  https://youtu.be/J5x_clmnUjo?t=30

I've always really wanted one. 16" bbl and almost 21" length sounds utterly awesome!

After seeing Max's video of the internals you'd definitely need to do very high quality stampings and CNC welding for many of the parts just because of how the mechanism is. 

I think it would be hard to impossible to do it without lots of stampings and precision welds, at least if you want a reasonable weight of end product.

It's a very cool design and I'd personally treasure a repro beyond any other gun I could possibly get!

It'd probably cost $10k each these days though lol.

The LOP looks pretty reasonable to me tbh.

A lot of people seem to think the tkb-022pm is bigger than it is for some reason but the gun is quite tiny. Here's two pictures which should help. It appears to come to a little past the crook of the one guy's elbow in the first pic.