Why doesn't anyone offer a 357Sig AR pistol?

[ABNAK]

Can't find one for the life of me (using Google at least). Lone Wolf and Quarter Circle 10 have them on hold. Anyone know of one that functions well?

I think the 357Sig would make an awesome little PDW-type weapon, and an AR pistol format would be awesome.

[czgunner]

I think I remember reading about a gas 357 sig AR a few years back, but I can't find it now.

[ABNAK]

There is the "Just Right Carbines" version as well as the TNW "Aero Survival Rifle/Pistol", but they aren't true AR's. They look AR-ish but they aren't.

[Todd.K]

What mags are out there in 40/357 that are adaptable to the AR magwell?

[WillBrink]

Can't find one for the life of me (using Google at least). Lone Wolf and Quarter Circle 10 have them on hold. Anyone know of one that functions well?

I think the 357Sig would make an awesome little PDW-type weapon, and an AR pistol format would be awesome.

Considering that the terminal ballistics of the Sig .357 is approx equivalent to the various 9mm offerings in JHP, and there's no lack of 9mm ARs, I'd think that would be the way to go no? Less expensive ammo also being a + I'd think. Anyone make a 10mm AR pistol?

[ABNAK]

What mags are out there in 40/357 that are adaptable to the AR magwell?

Glock mags are what has been used from what I've read. Pics I've seen are dedicated lowers built for the Glock mags.

[ABNAK]

Considering that the terminal ballistics of the Sig .357 is approx equivalent to the various 9mm offerings in JHP, and there's no lack of 9mm ARs, I'd think that would be the way to go no? Less expensive ammo also being a + I'd think. Anyone make a 10mm AR pistol?

The TNW Aero Survival Pistol (or carbine) can be had in 10mm.

Reason I chose 357Sig is at the higher velocities it should shoot flatter than a 9mm and probably a 10mm too. While the bullets in 9mm and 357Sig may be similar the terminal ballistics of the Sig pull ahead simply because of the velocity.

[czgunner]

A correct pressure 357 Sig load (not the watered down store bought stuff) should outrun even the best 9mm +p. Before I get flamed, I'm on the road and can't look at my load books...

[ABNAK]

A correct pressure 357 Sig load (not the watered down store bought stuff) should outrun even the best 9mm +p. Before I get flamed, I'm on the road and can't look at my load books...

Underwood's 357Sig loads are smoking. They advertise 1450fps for the 125gr loads but folks were actually getting up near 1500fps (and these are handgun velocities mind you).

Ballistics By the Inch has even the more sedate 125gr factory loads doing 1700+fps out of 13"-16" barrel lengths. I can only imagine what Underwood would get.

[WillBrink]

The TNW Aero Survival Pistol (or carbine) can be had in 10mm.

Reason I chose 357Sig is at the higher velocities it should shoot flatter than a 9mm and probably a 10mm too. While the bullets in 9mm and 357Sig may be similar the terminal ballistics of the Sig pull ahead simply because of the velocity.

Are we not talking PDW distances here per the OP? I guess it all depends on the intended role/use of the gun. Only advantages I'm aware of with the .357 Sig over 9mm is it's better on intermediate barriers if memory serves.

A correct pressure 357 Sig load (not the watered down store bought stuff) should outrun even the best 9mm +p. Before I get flamed, I'm on the road and can't look at my load books...

Shear velocity, at least in typical handgun rnds, does not appear to dictate terminal ballistics. Per comments above, guess it depends on what one plans to do with it. Flatter shooting would have it's benefits too, but I was strictly talking about PDW/SD/HD uses.