View Full Version : Teppo Jutsu now has a US distributer for .458 SOCOM uppers

October 18, 2004, 09:18 AM

We have entered into an agreement with Marty ter Weeme at Teppo Jutsu, and are now the US distributer for his .458 SOCOM upper receivers. We will have his high end uppers in stock shortly, and are working with a major manufacturer to have both those and some less expensive uppers mass produced for us as well. While we will be offering off the shelf uppers, custom uppers will still be available through Tromix, Teppo Jutsu, and SSK Industries.


October 18, 2004, 11:13 AM
Little bit expensive, but I'm poor and most things seem expensive. Still, I like the idea of something with the shotgun's knockdown power but with the AR's capacity. Very intriguing, indeed.

October 18, 2004, 12:59 PM
. . . though I recall reading about the concept at Arfcom.

What do you use for magazines?

October 18, 2004, 01:14 PM
Same ones you're using now. No mods needed.

October 18, 2004, 02:30 PM
Hmmph. And they work?

October 18, 2004, 04:36 PM
Believe it or not, yes. No mods.



October 19, 2004, 09:02 AM
Holy Smokes! :)

October 19, 2004, 09:39 AM
What Erich said! Very cool - no mags needed. So what's the most likely "tactical" use for this? Shooting through car doors and such...what? That's the 300 Whisper's big, BIG brother eh?

October 19, 2004, 09:51 AM
Firstfreedom...not sure what specific tactical use would be best suited for this cartridge...but it does look awesome. I will have to look into this further..."just to have one" might be enough for me. :cool:

October 19, 2004, 12:06 PM
Firstfreedom, it looks cool, but its not really the big brother to the 300 whisper.
It throws its bullets twice as heavy about 1.5 times as fast (a generalization, i know, but deal with it)

THe true big brother to the .300 whisper is. . . .

The .510 whisper.

458 socom does look really cool. Preformance of a lightly loaded 45-70 is plenty for deer, and probably elk out to 50 (maybe more) yards. And should preform well on two legged predators, too, i would surmise.

October 19, 2004, 12:23 PM
Those .510 Whispers are actually pretty intesting, ballistically. I also got excited about, is it the .30 mini-Whisper? The one that just uses a standard 7.62x25 case with long bullets? It would be fun in a Contender, I would think.

October 19, 2004, 03:15 PM
Wowsa, that .510 whisper is news to me - that's the most messed-up looking round I've ever seen - lol. What's the ballistics on it? Is it like a 700 gr 50 bmg bullet or what? What vels? Thanks.

October 19, 2004, 11:13 PM
The .458 SOCOM is comparable to a HOT loaded 45-70 compared to Speer #13 loads for modern high pressure rifles (350 at 2100 from a 22" in Speer versus 300 at 2100 from a 16" .458 SOCOM, even SSK's website mentions it beats the 45-70)

Also, if AR-10 is the big brother to AR-15, then the big brother to the .300 Whisper is the .500 Phantom. Check out the.500 Phantom (http://http://www.teppojutsu.com/500_Phantom.htm).

Regarding the tactical applications of the .458 SOCOM, several LE and MIL folks now have them and use them, it is ideal for suppressed work, defeating Level IIIa armor, windshields, barricades, doors, etc. The MO State Highway Patrol wants these for entry work as they will knockdown perps with vests regardless of defeat of the vest.