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(New Scientist)   How does a silencer on a gun work?   (newscientist.com) divider line 141
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33031 clicks; posted to Main » on 04 Dec 2003 at 5:37 PM   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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2003-12-04 07:35:28 PM
DogSlaughter

Thanks for the advice, but the craziest I get with guns is my Nintendo Zapper. Hard to make that "click" any louder.

And credit The Simpsons for that reference (when Homer gets his handgun). I take no credit :P
 
2003-12-04 07:35:38 PM
I shot a MP5SD, it has an integral silencer along the barrel. I was wearing muffs because there were other unsilenced weapons being shot around me, but through the muffs it sounded like somebody knocking 2 teaspoons together. I was impressed.
 
mem
2003-12-04 07:40:52 PM
Too bad all these "noise pollution conscious" hunters don't turn the weapons on themselves to help end redneck pollution.
 
2003-12-04 07:42:24 PM
 
2003-12-04 07:45:12 PM
hmmm... I've wanted a silencer or "suppressor" for either my 9mm or my .380 Makarov.

but I keep hearing they're illegal for pistols.
 
2003-12-04 07:47:24 PM
"I shot a MP5SD, it has an integral silencer along the barrel. I was wearing muffs because there were other unsilenced weapons being shot around me, but through the muffs it sounded like somebody knocking 2 teaspoons together. I was impressed."

...yeah, I've played Rogue Spear too....

 
2003-12-04 07:53:11 PM
you want loud....
Magnum Reaserch Lone Eagle 22-250
14" barrel.
 
2003-12-04 07:55:05 PM
I had the pleasure of shooting a friend's (legally owned) full auto 9MM Uzi with a suppressor and sub sonic ammo. The closest thing I can compare it to is an air ratchet. The metallic sound of the action cycling and you could hear the bullets impacting the ground and cutting through the grass.

Fun but full auto is too expensive for my budget.
 
2003-12-04 07:55:11 PM
http://www.gem-tech.com/ has some nice stuff just find a gun store in town and have them order it for you. All applicable state and federal laws will apply in buying it.
 
2003-12-04 08:00:11 PM
safeinsane

i looked at your profile.Enjoy your (soon) to be kid all you can. They get big and smarter than you befire you know it

 
2003-12-04 08:00:19 PM
mem, you could be the poster child for Planned Parenthood.


vegasj, It's a Class 3 weapon. Legal in Vegas. Bunch of Class 3 dealers there too. Anybody who told you their illegal for pistols is full of shiat.
 
2003-12-04 08:02:28 PM
vegasj, how do you like the Makarov? I've been thinking about getting one.
 
2003-12-04 08:04:18 PM
You must use sub-sonic ammo or it's still noisey as hell.
3/4 pvc 3/8 washers and 1" conduit makes a great silencer for a Ruger mkII with a bull barrel...or so I've heard. :)
 
2003-12-04 08:04:45 PM
and if your lucky, they will learn how to type the word before
 
2003-12-04 08:10:04 PM
I too have fired one of the mini USP's in .22 with one of the Advanced cans. Simply amazing! Even with Viper ammo all you hear is "phut" and the shell hitting the ground. Plus anyone knows that if you what real silence you start with a TC Contender in say .30 Whisper. All you hear is the hammer fall and the now classic "phut". My part time jobs entails doing demos for a Class 9 dealer. All you Class 3 guys know what that means.
 
2003-12-04 08:29:19 PM
Makarov's are susposed to be fairly nice, but go to Russia and get the silent bullets with the piston. 9mm Makarov rounds won't have as high a velocity as 9mm parabellum but more than .38 special. Parabellum are 9*19mm, Makarov are 9*18mm and .38 special are 9*17mm.


Russian Silenced Bullet SP-3



Russian Silenced Bullet SP-4

Hopefully that worked.
 
JPN
2003-12-04 08:37:16 PM
Makarov is a ghetto pistola which performs well above ghetto standards. Reliable shooter.

Personal preference is a 380 in that form factor though.

My fav is still my Marlin 30 30. Sweet bush gun for yote slayin. M14 also very sweet.
 
2003-12-04 08:42:14 PM
Spade Thanks for the enlightenment. I guess I reacted in a provincial Texas way, since hunting with a silencer here is illegal.

Besides, nobody would want to hurt TheOther...would they?

/still paranoid
 
2003-12-04 09:06:14 PM
I was given a silencer for my uzi when I was in the AF. The thing made it so quiet all you heard was the bolt smacking the back of the weapon. Then we added a buffer to the back of that massive bolt. It has this funny sound when it fired. sort of a schlick/thud sound. Good times. I have to agree on the sten though, cheap, easy to make. We were trained on them becuase you still see them around. I have to say though, I feel for anyone that uses them in combat. They're not really that reliable, and some of their mags didn't feed. They're the only smg save the MP5 I started on. German piece of crap.
 
2003-12-04 09:40:08 PM
Try reading Tom Clancy's "Without Remorse". It describes very well how to machine a silencer and how to mount it to the gun. The main character took a 1911 .45, silenced it, converted it to shoot .22 and put a catch sack on the side to catch the carts. He did it to clean the streets a little of drug dealers. Good story.

I still don't get the converting to a smaller round.
 
2003-12-04 09:45:01 PM
mmmm, MP5's.

Most comfortable weapon I've ever fired, feels like you could whittle with it.
Your cheek fits in that little groove like a violin.
The one I fired, didn't have a silencer/suppressor.
I thought it was a federal crime to possess one.
Apparently not.
 
2003-12-04 09:53:29 PM
Guess that reference:

    "What it did," Barris explained, showing him and Luckman black-seared passages burned through the foam rubber, "is augment the sound rather than dampen it. But I almost have it right. I have it in principal, anyhow."

/surprised no one beat me to it
 
2003-12-04 10:06:17 PM
Here are some books on do-it-yourself silencers. One mentions the old mob favorite - an oil filter fitted onto a threaded barrel.
 
2003-12-04 10:17:47 PM
Years ago, a neighbor used to pick of squirrels in his yard with .22 rifle. He used a section of volkswagen muffler that slipped right over the tip of the barrel.
 
2003-12-04 10:19:08 PM

Pillows do not make good silencers; As proof, try farting on one. Did you hear something? Of course you did, it was your ass. And what did it sound like? Probably a lot like a muffled trumpet, except a whole lot smellier. The sound from a gunshot will blast through a pillow like Superman's sperm through the back of Lois Lane's head.


Now, let's try farting on a potato. Did that work?

 
2003-12-04 10:43:15 PM
I tried using a potato as a silencer on my .22 once. Standing in my room, shooting out the window, I pulled the trigger. The potato exploded, one large chunk smashing 3 car models on my shelf. I've found a few things that work better in the past 15 years...
 
2003-12-04 10:44:03 PM
Parabellum are 9*19mm, Makarov are 9*18mm and .38 special are 9*17mm.

Not quite. 9x17mm is .380ACP, or 9mmkurz in some European nations. The .38 Special is significantly longer than 17mm in case length, being around twice that mark. It doesn't hold much more powder though, and is fairly anemic performer between the effectiveness of 9x18 Makarov and 9x19 Parabellum/Luger.
 
2003-12-04 11:25:17 PM
Who cares how the silencer works. It's getting the victims to stop screaming that always causes me trouble.
 
2003-12-04 11:45:43 PM
kiretul:

you're wrong about the terminal ballistics of suppressed rounds. the only ones that perform poorer with a suppressor are the ones fired out of an integral or ported-barrel suppressor, like the MP5SD-series. like i said, it reduces the muzzle velocity so much as to make the round much less effective. normal suppressors, however, increase the backpressure, and thereby increase the muzzle velocity and make the round more accurate. once the baffles fill with gasses, the gasses are expelled each round, and the baffles fill with the new expanding gasses. well, what happens to the old gasses? they're forced out right behind the round, increasing velocity. increased velocity usually has the benefit of increasing effective range. the gasses pushing on the bullet as it exits the suppressor also serve to stabilize it, increasing accuracy. the increased backpressure also serves to increase the cyclic rate of the firearm. my friend's M16, with a 16" barrel does something in the area of 750 RPM, cyclic, without the suppressor (i don't remember the actual numbers). with it, it jumps a couple hundred RPM. also, increasing barrel length will increase backpressure, and increase cyclic rate. a 20" barrel will have a higher rate than a 16" or a 14.5" or an 11.5".

LatamaCoricama:

that schlack was the bolt travelling forward. because the uzi fires from an open bolt, it'll always be loud and inaccurate in comparison to a similar firearm firing from a closed bolt, because the bolt throws its momentum into the whole thing as it closes.
 
2003-12-05 12:16:12 AM
What kind of silencer is recommended for a pistol-whipping? Anyone?
 
2003-12-05 12:36:40 AM
"vegasj, how do you like the Makarov? I've been thinking about getting one"

love it better than my Taurus 9


my dad gave me the Makorov bout a year ago... smooth and light... fits in my palm almost.

 
2003-12-05 12:47:04 AM
if a mime fires a gun wthout a silencer.... does it still make a sound ?
 
2003-12-05 01:04:46 AM
Insert: you are all now under investigation by the FBI for violations of Patriot act here.
 
2003-12-05 01:52:11 AM
Pillow over the head ,eh? Better not be shoving a desert eagle barrel into a flammable pillow and then fire it. Of course having never tried it I don't know for sure if it would catch fire, but im willing to bet it would.
Anyone know how large a suppressor for an m16 is? Isn't it like almost a foot long? I honestly don't know so i'd appreaciete someone informing me.
 
2003-12-05 02:47:21 AM
What about the cat Silencer from Postal 2, just lure a cat over, pick it up, stick the barrel up its @ss and voila, the cat silencer.
 
2003-12-05 09:23:29 AM
Sphinx16:

I think the mp5 feels great. However, in a combat scenario I would prefer something that was more reliable. A counting mechanism is just one more thing to go wrong, and it does. I had the sear break off during quals with the thing. That sort of sealed the deal with me never using one in the field. I'm sure it works great in a clean environment, but when there's dirt, grime, blood, etc, I would rather have an uzi, madsen, mk760, krink, something like that. Just more reliable.

I've always loved that stupid scene on the history channel where they rotate the mp5 around 270 degrees while its being fired to show that it won't jam. If your gun jams when you're firing it from ANY angle, then you don't want it. For its cost, the mp5 is just not really that great of a weapon. Yes, it looks cool, yes, the british use it, but that does not make it a good weapon. It should work under just about any circumstances.

I remember going through aquatic with that ^%*% mp5. I had to either put a condom over the end or plug it with something. That annoyed the hell out of me, and its not too easy to do when you're cold, in the dark, and being chased.

Once I was allowed to play with an UZI, I was much happier. No plugging, no jamming, overall a wonderful weapon. Fired the thing completely full of water and it ran like a charm. Fired it with a reciever full of sand, same thing. Best full auto out there. And controllable bursts.
 
2003-12-05 09:35:35 AM
A poor man's silencer, for close range only. Put barrel in opening of 24oz plastic water bottle partially full of water.
 
2003-12-05 09:50:26 AM
Silencer???? Break her jaw...that'll silence her.
 
2003-12-05 11:27:24 AM
Read Clancy's "Without Remorse" (something like that). The main character makes a suppressor and the book goes into fine detail on how to do it.
 
2003-12-05 12:26:59 PM
I had a buddy of mine who found himself in a little heat from a handful bad muthasuckas a while back. He was too broke to buy a silencer, so he pulled a plastic sprinkler head out his yard, drilled a few holes, and packed it with cotton. Of course it was a little more complicated than that, but you could fire a .44 from his backyard with little more noise than the sound of handclap.

The heat went away, but the silencer still remains. Redneck engineering at its finest.
 
2003-12-05 06:49:39 PM
AAC's M4-2000, which has a quick-attach threading (three turns and it's on, and you can't cross-thread it) is 5" long, and about 16 oz. in weight. the ranger, their standardly threaded 5.56 can, is like an inch shorter, and several ounces lighter.

it really depends on the decibal reduction you want. the military has just lowered its standards for reduction from 30-something to like 26 dB. the M4-2000 is 34-35 dB of reduction with standard ammo. subsonic 5.56 is expensive and totally worthless anyways, because it fails to yaw. M193 and M855 both need to be going at least 2700 fps to yaw, and subsonic ammo is significantly slower than that.

if you want less reduction, you can use a smaller, lighter suppressor. now that the military has lowered their requirements, a lot of the smaller manufacturers will step up with their smaller, noisier cans.

as for the reliability of the MP5: i can sum it up by saying this- it comes with an armorer's dowel kit to ram dimples out of the reciever. it is so prone to dimpling (which will render the thing useless) that it comes with the tools to get rid of the dimples. if you're a swat team, and you have an armorer at your disposal, and don't see a whole lot of adverse conditions, it's not a bad thing to have. but you're still faced with the inadequacies of the 9mm round, or 40 S&W, or 10mm, or .45, whichever MP5 variant you use. 5.56 has both better terminal ballistics and less penetration of normal interior and exterior wall construction.
 
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