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| M40 Round same as a M203 round? http://forum.alienslegacy.com/viewtopic.php?f=3&t=2332 |
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| Author: | PainkillerAz [ Sun Jul 29, 2007 4:09 am ] |
| Post subject: | M40 Round same as a M203 round? |
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 |
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| Author: | SSgt Burton [ Sun Jul 29, 2007 4:32 am ] |
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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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| Author: | joeranger [ Sun Jul 29, 2007 5:11 am ] |
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As an ex-203 gunner, the round is 40mm, and a lot of fun... |
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| Author: | Russ Krook III [ Sun Jul 29, 2007 9:01 am ] |
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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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| Author: | SSgt Burton [ Sun Jul 29, 2007 4:30 pm ] |
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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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| Author: | Outcry27 [ Sun Jul 29, 2007 8:26 pm ] |
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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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| Author: | exoframe2 [ Sun Jul 29, 2007 10:20 pm ] |
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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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| Author: | SSgt Burton [ Sun Jul 29, 2007 10:28 pm ] |
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Thanks for the comparision pic Matt! Good to have you over here! 
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| Author: | Cooter Davis [ Mon Jul 30, 2007 12:16 am ] |
| Post subject: | |
and here is a compairson pic of a 12 gauge shotgun shell vs a 40mm M203 round.... 
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| Author: | exoframe2 [ Mon Jul 30, 2007 12:46 am ] |
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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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| Author: | Cooter Davis [ Mon Jul 30, 2007 12:59 am ] |
| Post subject: | |
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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| Author: | Outcry27 [ Mon Jul 30, 2007 5:11 am ] |
| Post subject: | |
Quote: The grenades will cycle through my Mossberg 500.
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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| Author: | SGM Baldwin [ Mon Jul 30, 2007 6:56 am ] |
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Waaaaay too big. 
It's still for sale for whoever wants it... makes a great paper weight or conversation starter. |
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