Some help with cinematic idea

imagine_74714

imagine_74714

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Well, this question is something I didn't come up with, so if it sound stupid, don't blame me.
I have a friend in Korea who's a director. He is supposedly in development for new movie, which is kind of monster movie, I think... I don't know, he doesn't want to tell me much at this early in the stage.

Well, to make the long story short, he wants to know what kind of rifle (and what caliber) that with silencer, would be almost quite enough to use in urban environment, without people hearing it. I guess it has to do with some secret special force guys battling the monster at night, in the city. That's my guess.
Because modern Korean cinema being more hollywood-ish, you can see more and more guns in their movies, and I guess he wants to make it as realistic as possible. Since I know #### about this subject, I thought I'd ask here.

Sorry for the long winded question. I didn't really know how to direct it, but the gist of it is all there. Just don't expect my friend to pay you big bucks for the idea. :)
 
In order to understand "silencers" you have to understand the mechanics of a gun's noise. There are three distinct ways a gun makes a noise:

[1] Muzzleblast - this is the result of supersonic gasses that push the bullet out of the barrel. On average, the gas is travelling at approximately 5,000 feet per second. It breaks the sound barrier, and depending on the amount of powder being burned, also causes a secondary reaction known as "concussion." ( The oxygen around the muzzle of the gun is rapidly burned, causing a vacuum and the air rushing in to fill the void causes a big boom.)

[2] The bullet - if the bullet is travelling more than the speed of sound (roughly 1,100 fps) it will break the sound barrier as it travels downrange.

[3] The gun itself - the mechanical operation of a gun, particularly an autoloader, can actually be quite loud. You can hear this for yourself simply by racking the bolt of an unloaded automatic firearm back and forth.

A silencer is (or can be) designed to address two of the above noises. Firstly,
it slows the burning gasses down to a subsonic level so there is very little noise and no concussion. It can do this via two ways - either through a series of baffles that trap the gas behind the bullet as it travels though the silencer ( a "muzzle can" style of silencer) or bleeds gas through holes in the barrel out to a series of baffles outside of the gun barrel ( an "integral" silencer.) A revolver, because of the cylinder gap, cannot be effectively silenced.

An integral style of silencer usually slows a normally supersonic bullet down to subsonic levels, so there is no supersonic crack as the bullet travels downrange. A better solution is to use subsonic ammunition in the first place (ie: 45 ACP, .300 Whisper, etc.)

The noise of the gun can only be addressed by either using a type of firearms that does not lend itself to being noisy (such as a bolt action rifle) or by locking the mechanism of an autoloader and using it as a kind of manual repeater.

Remember too that the larger the cartridge, the harder it is to silence. Forget silencing rifle calibers altogether. With large pistol calibers, such as the 9mm or the .45 Auto, a good silencer will bring the noise level from about 120 dB down to about 90dB, which is still relatively loud. (That is about the same as someone talking loudly.)

Therefore, the absolutely QUIETEST weapon that you are describing would be a bolt action .22 LR rifle with a muzzle-can style silencer firing 40 grain Remington (or other make) subsonic ammunition. With this setup, you would only hear the sound of the firing pin striking the cartridge, then the sound of the bullet striking the target! :runaway: (I have seen and heard both types of silencers, so I can tell you from personal experience that is exactly what was heard.)
 
I think it's important to remember this is a movie.
Pick a gun/silencer combo that looks cool and is available to your friend.
Then add the (unrealisitically) quiet sounds in post production.
 
Smoothbore said:
I think it's important to remember this is a movie.
Pick a gun/silencer combo that looks cool and is available to your friend.
Then add the (unrealisitically) quiet sounds in post production.
Click to expand...

Exactly. You don't need to fire real bullets, so any silencer with any kind of lightly loaded blank rounds will sufficice.
 
I think my friend's wanting to be realistic about firearm, is because most of Korean men go through military service, and have at least minimal knowledge regarding mechanics of firearm.
He gave me more info over messenger this morning. The monsters are somekind of mutated things, through carcinogenic chemical substance. I guess he wants the monsters to have limited life span. And maybe weaker physical aspect, so it's easier to kill. I don't know. I'll guess I'll watch the movie when it comes out.
 
Did your director friend care about the Western-style or Eastern-bloc weapons?

If his armoury expert have no problem obtaining weapons from Eastern bloc, how 'bout the AS Val that is chambered for the 9x39mm(basically a necked out 7.62x39mm cartridge)?

as_val1.jpg


About the Russian slienced ammo:

http://world.guns.ru/ammo/sp-e.htm
 
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