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  1. #1

    Default EFFECT OF SUPPRESSORS ON OPERATING SYSTEMS

    Quote:
    Originally Posted by Tommie
    All the terms.....don't forget the sound moderator...IMO terminology is not of importance; it is the actual understanding of the technology or product.

    Yes Tommy I agree with this.


    3. If you are using standard ammunition you normally over pressurized the system, it can be of advantage to lower or control the pressure. And reduce rate of fire.
    4. If you have been using a suppressor continuously, your firearm will become unreliable due to all the dirt and fouling that was send back into the system – best way to have a quick solution for operational problems is to increase pressure, flow and volume of gas that will then assist or actually force operation during these condition.

    On Point 3 and 4 I would like to be enlightened by you, but I think we are hi-jacking the the topic here. I think we should start a new thread about the effect of a silencer on the functioning of a weapon. Will you start the tread or should I?

    Regards

    WAH


    see http://www.gunsite.co.za/forum/index.php?topic=5620.0

  2. #2

    Default

    Hi ongolo
    Herewith the following reply, I am quite busy so it took me a while to reply to this post.

    3. If you are using standard ammunition you normally over pressurized the system, it can be of advantage to lower or control the pressure. And reduce rate of fire.

    Reply:
    1. If you use standard ammunition in a LM rifle for example under normal conditions without suppressor, there is a certain volume of gas pushing the piston backwards to let the rifle cycle. If you use for example subsonic the cycle rate or rate of fire would be reduce and the opposite if you use high velocity ammunition. (there could also be other factors controlling rate of fire with ammunition)

    2. The volume and speed of the gas passing through the gas port is determine by the type of load and bullet weight, example a subsonic round with a lighter bullet will create much less pressure for the gas pushing the piston, as for a subsonic round with a heavier bullet will create more pressure due to the fact that it pushes harder to let the bullet pass through the barrel, and the time factor of pressure in the barrel is also important. The longer it takes to exit the barrel, the more gas can slip through the gas port and push the piston. That’s one reason why they tend to increase the weight of the bullet. (NOTE THAT THIS IS STILL WITHOUT THE SUPPRESSOR)

    3. Now if you attached a suppressor to the rifle the following happens. As the bullet exit the barrel and enter the suppressor the gasses behind the bullet fills the suppressor and create a sort of lock or block as it fills the suppressor cavities so all excess gasses are pushed back wards under pressure into the barrel through the gas port and still moving down the barrel and thus increase the cycle rate. That’s the reason why you get a back burst of dirt into your face when shooting continuously with a suppressor. Also the reason for al the dirt entering the whole system. The follow up rounds will be fired into a partially filled suppressor and thus create more back pressure. This is one of the main reason for a suppressor to burst. It is normally the second or third shot fired that burst a suppressor if it is a bad quality or wrong type of suppressor for the weapon.

    4. Now to come back to explain point number 3 if you use standard ammunition your rate of fire and pressure will then be increase if you use a suppressor as explained. To control the pressure you need to either control the amount of gas you let through you gas port or the amount of gas created by the ammunition. This will decrease or keep the rate of fire as required.

  3. #3

    Default

    4. If you have been using a suppressor continuously, your firearm will become unreliable due to all the dirt and fouling that was send back into the system – best way to have a quick solution for operational problems is to increase pressure, flow and volume of gas that will then assist or actually force operation during these condition.

    Reply
    1. If your firearm is in the above mentioned condition (that would mostly occur in extreme military condition). The firearm will start cycle slower and create opportunities were there is changes of stoppage or half cycles were the round is not ejected. If you do have an adjustable gas port, you can immediately increase the flow of gas to push the piston faster to release the bolt and thus create more pressure on the cycling process to let it cycle reliable under such condition. If you have higher velocity rounds it can also work, but why would you need to carry different rounds around if you can only adjust the gas flow. And in actual military application this could be a downfall if you have to do mag changes if you are in contact. These type of condition do not occur everyday, but it can happen. If it happens remember the most important thing is to stay calm....

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