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Non full-auto rated suppressor usage

Discussion in 'NFA Firearms and Accessories' started by lions, Feb 16, 2010.

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  1. lions

    lions Member

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    For a suppressor that is not rated for full-auto fire, what are the limits for very rapid semi-auto fire? Would doing a mag dump as fast as one could pull the trigger have any negative effects?

    I remember reading somewhere:uhoh: that it is not recommended. (I can't remember where though, not exactly reliable information.)

    What is taken into account for a full-auto rating? Heat, pressure, something else?

    I have a Tac-65 .22lr suppressor that should be coming in any day now.:D I was hoping THR could clear this up for me. Thanks.
     
  2. WoofersInc

    WoofersInc Member

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    One mag dump on that can should not have any issues. Here is a print out from Tactical Innovations on what they consider full auto usage.


    I have run my Gemtech Outback pretty hard and it is an all aluminum can similar to the Tac 65.
     
  3. lions

    lions Member

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    How about that, from the horse's mouth. Thanks for that and your experience Woofers.

    Anyone else care to hit me with some knowledge?
     
  4. DoubleTapDrew

    DoubleTapDrew Member

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    Jeez 2200 rounds on FA! Those AM180s have a very high rate of fire too.
    I've shot mine pretty fast and it does get warm but they seem to dissipate heat pretty well too (with a .22lr can, haven't tried centerfire yet).
    I have wondered if it loses suppression ability from the gasses of the previous shot not having time to leave before the next blasts come through.
     
  5. WoofersInc

    WoofersInc Member

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    Actually a suppressor gets quieter after the first shot. There is a thing called first round pop. It is the oxygen in the suppressor allowing for the propellent to burn. The next series of shots have the suppressor with the oxygen burned off in it, so the remaining propellent doesn't burn thus lower the sound. It is not a large difference in sound, usually only a couple of decibels but it can be noticable to some people. Some people will put a squirt of nitrogen into the suppressor right before firing to eliminate this.

    This is assuming you are firing rapidly. Slow fire allows the oxygen to get back into the suppressor.
     
  6. Zak Smith

    Zak Smith Moderator Emeritus

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    We have a class 3 SOT for manufacturing silencers.

    It's mainly about the change in material properties as the temperature rises. The difference between a F/A rated can and a semi-rated can primarily material, with some construction issues secondly.

    Here's an example I pulled off the internet how materials can change properties with temperature
    [​IMG]

    The material we use to construct our F/A rated suppressors is different than the materials we use for our other (ie lightweight) ones. The design and construction is otherwise very similar.

    On our bolt rifle suppressors, the DuraCoat will burn off before structural damage is done to the material.

    -z
     
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