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Thread: Suppressors and Recoil?

  1. #11
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    Recoil is not the result of pressure in the barrel or gas system, it's Newtonian physics: the momentum of the bullet and gas moving forward is equaled by the momentum of the firearm moving rearward. Anything that takes some of that gas that would be moving forward and either slows it down or redirects it rearward or to the sides reduces the recoil impulse of the firearm. That's how recoilless rifles work, the momentum of the backblast equals the momentum of the projectile. Automatic and semiautomatic weapons complicate that by moving some parts of the firearm relative to each other and by using springs and other devices to spread out the perceived recoil impulse over a longer span of time, but the overall momentum is always conserved. The reason overgassing causes an increase in perceived recoil is that because the BCG and buffer are moving more rapidly the recoil impulse is concentrated over a shorter span of time.

  2. #12
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    Hi-velocity forward moving gases hit the baffles and push the gun forward, countering natural recoil.

    Increased back pressure will increase rearward bolt velocity and if spring does not absorb energy, will allow bolt to bottom out and that will be felt/heard.

    Lotta gas though to offset the forward push.

  3. #13
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    Quote Originally Posted by tylerw02 View Post
    From the muzzle break or a bare muzzle?

    Therein lies the distinction.


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    This

    I thought the suppressor was increasing recoil because my most recent memory of recoil from firing unsuppressed was with a muzzle brake. All things being equal, an open muzzle would recoil more harshly than a suppressor .

  4. #14
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    I've always noticed a reduction in both felt recoil and muzzle flip when running the suppressor. I recently played around with a camera mounted to my SBR and really noticed how little the gun moved when firing. I've always known it wasn't much when actually shooting, but the video shows just how level the gun stays. The adjustable gas block probably makes a larger difference in felt recoil since it's basically taking the harshness out of the action of the rifle.

    Specs are:
    10.3" DD Barrel
    GenII Syrac AGB
    VLTOR A5 w/ A5H2 buffer
    Sprinco Green Spring
    AAC M4-2000 mounted with an AAC Brakeout



  5. #15
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    Wouldn't basic physics dictate more mass or weight requires more energy to move? Is more energy being created with a suppressor? I guess in theory, if the ratio is the same with equal recoil but with more mass or added weight with the suppressor, then there should not be more recoil but less. Perhaps I'm way off........

  6. #16
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    Gases outrun the bullet in the can. Then all escape forward through a tiny hole. I believe this is why some perceive more recoil. With a brake, the gas escapes in all directions, or up and to the sides forcing the muzzle down. Cans do reduce recoil. It's very evident with spin on cans that normally get shot crowned without a md. The weight does help but not to the level a brake does.


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  7. #17
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    Quote Originally Posted by eodinert View Post
    On my Barrett M99, I can assure everyone that a suppressor increases felt recoil... no moving parts to complicate anything.
    Quote Originally Posted by tylerw02 View Post
    From the muzzle break or a bare muzzle?

    Therein lies the distinction.
    Compared to the brake. I'm not brave enough to shoot it without the brake.

  8. #18
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    Quote Originally Posted by eodinert View Post
    Compared to the brake. I'm not brave enough to shoot it without the brake.
    If you shoot it no can, no brake you'll quickly find suppressors indeed reduce recoil.


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  9. #19
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    Muzzle flip

    To all the people posting that their cans reduce muzzle flip - it should be obvious that when adding weight to the end of your weapon that muzzle flip will be reduced.

  10. #20
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    That has already been considered and pointed out.


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