Pocket Auto in 5.7x28mm?

[Swing]

Hey pallies. A recent video on the Soviet PSM pistol (5.45×18mm) got me to thinking about this. Has anyone produced a pocket-ish auto in 5.7×28mm? Google tells me that the answer is a "No". But I thought I'd toss it out there. Thanks!

 

[Hanzo581]

Not that I've seen.

 

[Swing]

Thank @Hanzo581. That is what I've found, both before and after posting. I was just curious.

Tangentially, the relatively rare .25 NAA has ballistics pretty damn close.

 

[Stringfellow]

Wouldn't a short barrel get you like a two foot fireball muzzle blast?

(FN5.7 already known for loud report and big fireball)

 

[Swing]

Wouldn't a short barrel get you like a two foot fireball muzzle blast?

Probably. Wackier designs have been mass produced, of course, but ... I lost my train of thought.

 

[grampajack]

I think the barrel would be too short to get any decent foot poundage out of it. Heizer tried to make a .223 pocket pistol and basically it's a .22lr with lots of recoil and a massive fireball.

I have always wanted to make a pen gun in 5.7mm though. It would have a 4-5'' barrel, which should give it just enough juice to get the job done. It would be a weapon of last resort that you could use if forced to grapple with someone. I have an idea to basically use a thumb clicker to expose the firing pin, and from that point it would be slam fire. Just hold it in a reverse grip and slam it into the assailant, in the neck, head, or chest. Unfortunately, though, the ATF would frown on that...

 

[Hokkmike]

There are only two pistol made for the 5.7 that I know about, the FN and the Excel arms.

 

[ClickClickD'oh]

Tangentially, the relatively rare .25 NAA has ballistics pretty damn close.

To the 5.7x28?

 

[grampajack]

I had to look up the .25 NAA, as I had never heard of it before. 23k psi max pressure, 35gr pill, and 1100 fps (assuming that's out of a pocket pistol), making for 125 ft-lbs. Very far removed from 5.7mm. Though if you did fire a 5.7 from a 1'' barrel that's probably about what you would get. Though I also imagine that if you fired a .25 NAA from a 5'' barrel you would only pick up a few hundred fps tops. That's where the 5.7mm really gets its magic is it gains velocity quick to achieve rifle speeds in short barrels. Ballistically, it's closer to a rifle caliber than a pistol one.

 

[Swing]

To the 5.7x28?

No, the Russian round (5.45×18mm). Sorry, should have specified.

 

[Hanzo581]

There are only two pistol made for the 5.7 that I know about, the FN and the Excel arms.

Don't forget this little guy.

http://masterpiecearms.com/shop/mpa57sst-5-7x28mm-pistol/

 

[Hokkmike]

Don't forget this little guy.

http://masterpiecearms.com/shop/mpa57sst-5-7x28mm-pistol/

Thanks - never saw it before!

 

[bnolsen]

I think the "28mm" part probably gets in the way of making a compact pistol. That's a lot of slide travel.

 

[grampajack]

I think the "28mm" part probably gets in the way of making a compact pistol. That's a lot of slide travel.

Agreed. It would have to be a derringer to make it more concealable than the alternatives.

 

[Prijador]

I recall an article where one (of the very few) vendors in the 5.7 market said they tried to make a shorter barrel (than the standard 4.8 inches) and it simply wouldn't work (at least in the actual FiveSeveN design - the spring is as short as it can be).
I will have to see if I can dig it up...
Edit: not the article I was looking for, but an interesting thread:
http://fnforum.net/forums/fn-five-s...ct-fiveseven-pistol.html#/topics/11691?page=2

Of course you can make a gun with whatever length barrel you want, the bullet might just plop out in a large-ish fireball though...

 

[grampajack]

I recall an article where one (of the very few) vendors in the 5.7 market said they tried to make a shorter barrel (than the standard 4.8 inches) and it simply wouldn't work (at least in the actual FiveSeveN design - the spring is as short as it can be).
I will have to see if I can dig it up...
Edit: not the article I was looking for, but an interesting thread:
http://fnforum.net/forums/fn-five-s...ct-fiveseven-pistol.html#/topics/11691?page=2

Of course you can make a gun with whatever length barrel you want, the bullet might just plop out in a large-ish fireball though...

That's interesting. I wonder if they can't keep the breech locked long enough with shorter designs in general, or if it's just due to the design of the Five Seven itself. I don't have a good grasp of how the Five Seven operates. I know it's short recoil, but the barrel doesn't tilt.

 

[FIVETWOSEVEN]

5.45x18 is like a .22lr besides that it can pierce soft body armor. The Russian PSM is my grail gun since they are so difficult to find in the US.

 

[Hokkmike]

5.45x18 is like a .22lr besides that it can pierce soft body armor. The Russian PSM is my grail gun since they are so difficult to find in the US.

Ah yes, the allure of the unobtainable. I had the same problem with Kathy Ireland.

 

[Prijador]

I wonder what the maintenance is on one of those, Hokkmike

 

[grampajack]

I wonder what the maintenance is on one of those, Hokkmike

If you have to ask you can't afford it.

 

[FIVETWOSEVEN]

Ah yes, the allure of the unobtainable. I had the same problem with Kathy Ireland.

There's a local gunshop near me that has one on display as part of his personal collection.

 

[usp9]

There's a local gunshop near me that has one on display as part of his personal collection.

How many Kathy Irelands are there?

 

[Swing]

How many Kathy Irelands are there?

LOL! Only one, as far as I know, which puts her slightly less common than a PSM in this country.