Military Guns and Ammunition
Hosted by gatnerd
This is intended for people interested in the subject of military guns and their ammunition, with emphasis on automatic weapons.
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NGSW Phase 2 Consolidation and info Small Arms <20mm
From: EmericD
8/9/21
poliorcetes said:I realized that Textron / HK rifle is needlessly extended backwards.
A lot of bolt travel equals less bolt velocity before hitting the buffer and less "felt recoil".
From: smg762
8/9/21
The soviet prototype AK used this too...i think it was called the TKB022...
am i rigt in thinking they both use the same rising chamber mechanism..
Also, any thoughts on that 'finned bearing surface' in terms of feasibility?
Seems like a way to get a .22 up to 762 nato energies - without a sabot
From: stancrist
8/9/21
poliorcetes said:Recovery spring can also work against recoil and thus it needs a sizeable working lenght. But it could be placed elsewhere and save some lenght to the weapon, even permitting an innovation as novel and groundbreaking as a folding stock
Not sure what you mean.
It looks to me like using the Steyr ACR mechanism in a conventional rifle would not allow any reduction in weapon length.
And because of the downward ejection, I see no way to significantly reduce the overall length of the bullpup configuration.
From: smg762
8/9/21
If one applied the 85-100k pressures to , say, a .220 swift, what would the result be....could it reach NGSW energies?
From: EmericD
8/9/21
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).
From: DavidPawley
8/9/21
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.
From: roguetechie
8/9/21
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.
From: Red7272
9/9/21
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.