The Firing Line Forums

Go Back   The Firing Line Forums > The Skunkworks > Gear and Accessories

Reply
 
Thread Tools
Old February 17, 2000, 08:54 PM   #1
HKMP5SD6
Member
 
Join Date: February 15, 2000
Posts: 26
I have a question. Is there a difference between a silencer and a suppressor? Also, how does a silencer or suppressor work?

------------------
"You can run, but you'll just die tired"
HKMP5SD6 is offline  
Old February 17, 2000, 10:22 PM   #2
Jake 98c/11b
Senior Member
 
Join Date: November 25, 1999
Posts: 471
A silencer doesn't exist, can't eliminate the sound of a shot just supress it. Supressors work in three ways, or any combination of three ways. Volume is used to contain the expanding gasses until they are released into the environment at a lower pressure. Turbulance holds the high pressure gasses in the supressor so the pressure can bleed off into the environment over a longer period of time. Cooling the hot propellent gasses will reduce the volume of gas, reducing the volume of gas lowers the pressure and sound intensity is directly related to the pressure. Hope this helps because anything more than explaining the principals involved might lead to legal problems, I have an attorney friend who shoots but I don't like to ask him legal questions. I am afraid that if I deal with him as an attorney I won't like him anymore.
Jake 98c/11b is offline  
Old February 18, 2000, 01:12 AM   #3
jcoyoung
Senior Member
 
Join Date: January 20, 2000
Location: Oak Forest, IL
Posts: 661
It is illegal to make a supressor unless you have BATF approval, paid the 200 NFA tax, jump through all the legal hoops. That is, IF suppresors are legal in your state.


[This message has been edited by jcoyoung (edited February 18, 2000).]
jcoyoung is offline  
Old February 18, 2000, 12:06 PM   #4
Jeff OTMG
Senior Member
 
Join Date: October 15, 1998
Location: OKC, OK & Austin, Tx
Posts: 3,707
The two previous responses are accurate. I just want to add a couple of things generally restating what has been said.

1. The terms 'suppressor' and 'silencer' are used interchangably. Suppressor is the correct term. Also called a 'can'.

2. The sound a firearm generates comes from 3 areas: 1) the cycling of the action, 2) the rapid, uncontrolled expansion, of hot gases from the round being fired, 3) the sonic boom of the slug if it exceeds about 1100 fps. To suppress the noise from a firearm you try to have as much of an effect as possible on these 3 areas. For action noise you can use a single shot or bolt action. Some semi-auto pistols have a slide locking device so the pistol becomes a single shot and the pistol must then be cycled manually. The sonic boom is easy to fixed by using sub-sonic ammo or, judging by your handle, as the MP5 does by bleeding off enough gas so super sonic ammo becomes sub-sonic. To quiet the 'explosion' requires slowing down, controlling direction, and cooling, the expanding gases. This is why when you look into a suppressor you will find, baffles, heat sinks, and expansion chambers. It is also why many suppressors become less effective when hot and less effective when used dry if they were designed to use wet. Also, the lower volume of gas a cartridge creates (ie. less gun powder) the easier it is to suppress. So a standard velocity .22 rimfire is easier to suppress than a .380 ACP, which is easier than a 147 gr 9mm, which is easier than a .45 ACP, which is easier than a .223, which is easier than a .308. Less rapidly expanding hot gases also mean that a suppressor can be made smaller.
Jeff OTMG is offline  
Old February 20, 2000, 12:05 AM   #5
Daniel Watters
Senior Member
 
Join Date: February 7, 1999
Location: USA
Posts: 644
To be fair, the inventor of the firearm sound suppressor Hiram Percy Maxim dubbed his devices 'silencers'. Hence, the name stuck, even though the resulting discharge is by no means silent.

Daniel Watters is offline  
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 03:19 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2014 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.07018 seconds with 9 queries