I would like 10mm auto for a subgun with a foldable stock and a total overall length without stock of 12 inches, with a direct impingement or short piston system and reinforced bolt so that you can load the cartridge to it's proper norma magnum level now and forever, and an adjustable gas system for anything less. Barrel should be ballard cut, featuring a stair-step front sight with an adjustable rear mounted as far back on the upper as it can go (sighted at 75m), and the barrel should be ported 90 degrees from the sight. Ashwood fore-end should be hard-mounted to the upper, and the barrel allowed to float. Grip and trigger should be mounted in the first 3 inches of lower, or mounted in the last six inches if bullpup config, set at 3.5lbs, and the gun should be able to use glock mags. Finally, it should be easily field stripped. The idea for this gun is as a woodsman's gun. It's mostly out of the way, can do a lot of fighting, and put meat in the pot.
Interesting thoughts, my borscht eating friend.
> something more suitable for a paired handgun like 357sig(or improvement of it like 9dillon or similar) would be better in most cases.
You missed the part where I had this in mind as a woods-gun. You do NOT go up against a big boi with a 9x19. Alaskans already use the mighty ten against polar bear.
>foldable stock
>Will you cut the barrel to reach that (length)?
Including chamber you can have a barrel length of 6-8 inches given that 10mm only requires 1.3 inches in order to reliably clear the action. Using a short, high compression strength spring with a telescoping bolt or underslinging the spring means that the action can be very small indeed, especially since….
>Why? You could have virtually any system and you choose a gas one. Various blowbacks shine in SMGs, there's so much that can be done and you pick a gas operates system. Really?
>It's an SMG, man. A small rifle that shoots pistol rounds. How weak should you make a rifle to make it not able to withstand pressures that a handgun can?
….it is much easier to make a smaller and lighter and stronger action by using a gas system. In order to deal with the amount of bolt-force from a properly loaded 10mm all day erryday, you would require a lot of tool-steel behind the chamber to not blow the gun the fuck apart, which also contributes to recoil and drastically slows fire rate and contributes to overall wear and tear on the gun. A gas system mounted an inch in front of the chamber can be adjusted to your ammo to give the correct amount of bolt travel instead of ramming it into your palm all the time.
>Why not polygonal?
Because cast bullets don't like polygonal.
>Front? Not rear? maybe i'm misunderstanding but how does this thing look? DDG shows me stairs.
Revolvers like the ruger bisley use a windage adjustable sight and a front sight that looks exactly like stairs from the front to give you absolute control over where your shot lands. I have no idea what the actual name for them is.
>Is that really necessary? Why not get an appropriate muzzle device instead?
With a gun this short, you need all the sight radius you can get. Adding a muzzle-brake means you're adding more length to a gun designed to be small, and slip on suppressors exist for being vewy qwiet.
>It won't with a gas system but most SMGs do have these, sure.
It will if you mount it only a very short distance after the chamber.
>Ok, though maybe you should leave a bit more space for a forward grip.
Combine trigger-grip with forward grip for this.
>Mags
It is easier to sell a gun that uses existing parts than to add your proprietary magazines into place.