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From:	Lou Nau x2885 <nau@****.EPI.SYR.GE.COM>
Subject:	Recoil comp. and sound suppressors, can they work together?
Date:	Mon, 22 Nov 1993 14:21:02 EST

Message no. 1 One of my players wants to use Gas Vent Recoil Compensators and a sound
supressor at the same time.
Now the way I understand it, both of these devices work by
redirecting or modifying the way the barrel gases are released. Not
to mention that both are barrel mounted devices. So I would think
that both could not be used at the same time. I am not a weapons
expert, however ( you mean it's s'posed to point the other way??), and
my understanding of the way these devices work may be wrong, so any
comments for or against this combination would be greatly apreciated.

thanks,
-lou

From:	Thomas Frost <frost@******.UMD.EDU>
Subject:	Re: Recoil comp. and sound suppressors, can they work together?
Date:	Mon, 22 Nov 1993 15:04:49 -0500

Message no. 2 > One of my players wants to use Gas Vent Recoil Compensators and a sound
> supressor at the same time.
> Now the way I understand it, both of these devices work by
> redirecting or modifying the way the barrel gases are released. Not
> to mention that both are barrel mounted devices. So I would think
> that both could not be used at the same time.

Theoretically, both could be used, if the recoil compensator were
threaded for a silencer; the silencer would fit ahead of the gas
vents. In practice, it's absurd. The recoil compensator would vent
gases from the front of the barrell pointed upwards, while the
silencer (I believe) breaks up the shock wave from the round and the
exhaust gases...except for the gases used to compensate recoil.

The short answer is, it won't work.

--
Spoken: Thomas (Frost) | "The rats eat the cats,
Smart: frost@******.umd.edu | the cats eat the rats,
Not smart: umiacs!frost | and we get the skins for free!"

From:	Richard Pieri <ratinox@***.NEU.EDU>
Subject:	Re: Recoil comp. and sound suppressors, can they work together?
Date:	Mon, 22 Nov 1993 15:50:27 EST

Message no. 3 >>>>> On Mon, 22 Nov 1993 15:04:49 -0500, Thomas Frost
>>>>> <frost@******.UMD.EDU> said:

>> One of my players wants to use Gas Vent Recoil Compensators and a sound
>> supressor at the same time.

frost> The short answer is, it won't work.

The long answer is, it won't work, and here's why.

Bullets are accelerated by rapidly expanding gasses in the firing chamber,
caused by burning the propellant (gunpowder). These gasses are expanding at
a rate faster than the projectile, and when they exit the barrel, they
create a sonic boom. Yes, the lound noise firearms make is due to the
propellant gasses escaping at a velocity greater than the speed of sound;
the bullet makes a whip-crack sound, not a "backfire" sound.

To suppress the sonic boom, the gasses need to be slowed down to subsonic
speeds. This is done with a sound suppressor, a series of spring-separated
disks inside a vented tube. The spaces between the disks trap the gasses
and slow them down to a subsonic level, and dissipates them out.

Now, for gas venting to work, the propellant gasses are directed up,
against the recoil. For it to be effective, the gasses /must/ have nearly
their full velocity to actually have any significant effect on the recoil
force vectors.

So, to combine the two, the weapon must be designed to use both vents and a
suppressor, and the vents and suppressor must be designed for the
particular weapon. In other words, unless the weapon comes with this
equipment, you can't add both on later.

--
Rat <ratinox@***.neu.edu> Northeastern's Stainless Steel Rat
ask about rat-pgp.el v1.63 PGP Public Key Block available upon request
||| | | | | | | | | | | | | | | | | | | | | | | |||
I am created Shiva, the Destroyer, Death, the Shatterer of Worlds.
The dead Night Tiger made whole by the Master of Sinanju! --The Destroyer

From:	ChriZ Dane Pedersen <cbp1002@******.CAMBRIDGE.AC.UK>
Subject:	Re: Recoil comp. and sound suppressors, can they work together?
Date:	Mon, 22 Nov 1993 21:27:29 +0000

Message no. 4 You are right. the two are incompatible.

Gas vents eject the air jet in the barrel sidewise to minimise the
recoil, whereas the silencer tries to contain it in a diffuser.
(like on a wind tunnel)

Can't claim any detailed knowledge of the subject, however.

ChriZ

From:	Julian M Wiffen <ne95003@******.AC.UK>
Subject:	Re: Recoil comp. and sound suppressors, can they work together?
Date:	Tue, 23 Nov 1993 11:23:03 +0000

Message no. 5 Some of the weapons in the Street Samurai catalogue are mentioned
as having an "integral" sound suppressor. Could they work with a gas vent
mounted on the barrel?

Julian

From:	Richard Pieri <ratinox@***.NEU.EDU>
Subject:	Re: Recoil comp. and sound suppressors, can they work together?
Date:	Tue, 23 Nov 1993 12:33:17 EST

Message no. 6 >>>>> On Tue, 23 Nov 1993 11:23:03 +0000 (GMT), Julian M Wiffen
>>>>> <ne95003@******.AC.UK> said:

ne95003> Some of the weapons in the Street Samurai catalogue are
ne95003> mentioned as having an "integral" sound suppressor. Could they
ne95003> work with a gas vent mounted on the barrel?

If they do /not/ have it already, then /no/ they cannot use both.

I thought I said that already. You can't combine sound suppression and
recoil compensation unless the weapon /was designed for both to begin
with/. You can't add one to the other at a later date.

--
Rat <ratinox@***.neu.edu> Northeastern's Stainless Steel Rat
PGP 2.x Public Key Block available upon request
||| | | | | | | | | | | | | | | | | | | | | | | |||
It is a proud and lonely thing to be a Stainless Steel Rat.
--`Slippery' Jim DiGriz

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