Does anyone know if a M40 round is the same size as a M203 round? Or know what the dia. is on both of them?
Thanks, Painkiller

Isn't it the same diameter as a 12 gauge shotgun round?

At any rate it's mentioned as a 30mm pump action grenade launcher in the film.

EDIT- The M203 is 40mm.

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I told you I'd shoot, but you didn't believe me! WHY DIDN'T YOU BELIEVE ME!?!

As an ex-203 gunner, the round is 40mm, and a lot of fun...

30mm is 1.18 inches. The standard 12 ga round is around 3/4" (give or take 1/8" or so...) so definately smaller than the fantasy 30mm specified by James Cameron.

Russ

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"A writer needs a pen, a painter a brush, and a filmmaker an army." - Orson Wells.

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I think Dom made one using the 30mm diameter line as a starting reference.

The end result was this gigantic M40 grenade! Looked about the same size as a 203 round!

So the M40 may not be 30mm- but the buttcap with the brass primer that resembles a shotgun round is the same dimensions as an actual shotgun round, yes?

Where in the hell is Tom when we need him?!

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I told you I'd shoot, but you didn't believe me! WHY DIDN'T YOU BELIEVE ME!?!

I would imagine it is almost exactly the same dimensions as a shotgun round, seeing as how they were shown being chambered into what we know to be a Remington 870 action.

Correct me if I'm wrong, of course, just a guess there.

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CPL Sean Maio A01/TQ2.0.72156E1
Public Relations Division (Temporary Cross-Assignment)
M-56 Smartgun Operator, A/3Btn, II CMEF, USS Sephora

The rim of a 12ga shell is 7/8", which is about 22.25mm. The diameter of the shell is 3/4", which is a little over 19mm.

Here's a comparison shot with a Dean O grenade:



The grenades will cycle through my Mossberg 500.

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Exo2

Thanks for the comparision pic Matt!

Good to have you over here!

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I told you I'd shoot, but you didn't believe me! WHY DIDN'T YOU BELIEVE ME!?!

and here is a compairson pic of a 12 gauge shotgun shell vs a 40mm M203 round....

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If you accept pocket lint as a currency well I'll take it all!

I'm not sure if that's an artillery simulator round, but it's considerably longer than the HE/HEDP grenades.

The standard M203 grenade has a 46mm case, with a 40mm projectile.

Here is a photo of an HEDP round, HE, and a white star parachute flare (flares are lower pressure/velocity, hence the even shorter case).

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Exo2

actually its a teather round.... What that would be used for I don't know. Marking distance perhaps? Anyway here is another size compairson for ya.....

http://www.mr40mm.com/index_files/Page712.htm

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If you accept pocket lint as a currency well I'll take it all!

You, sir, have excellent taste in shotguns.

(I'll give you three guesses what I shoot and the first two don't count xD)

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CPL Sean Maio A01/TQ2.0.72156E1
Public Relations Division (Temporary Cross-Assignment)
M-56 Smartgun Operator, A/3Btn, II CMEF, USS Sephora

Waaaaay too big.



It's still for sale for whoever wants it... makes a great paper weight or conversation starter.