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Thread: 16" rifle length uppers

  1. #11
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    Quote Originally Posted by Skyyr View Post
    Off-topic, but wow. They have this written on that page:

    "The covered barrel is a plus, because if the raw barrel is touched to anything like a barricade/cover during the firing process, the harmonic vibrations of the barrel will be interupted, and the shot will not go where the shooter intends. A covered barrel does not get interrupted during the shot."

    So I guess the non-free-floated handguard that the barrel is touching doesn't qualify as actually "touching."
    I may be wrong, but....

    If the barrel is already touching the non-free float, then the harmonics would be different during zeroing anyway, thus the altered harmonics become the zero. If you were to remove the non-free float and put a FF tube on there so that the barrel was touching nothing, I imagine you would have the opposite effect and your zero would be off from when it had the non FF tube.

    Edit: At least, that's what my non-engineer but still pretty tech savy mind things. I'll stop deviating from topic now.
    Last edited by BrigandTwoFour; 03-26-10 at 18:22.
    "Man is still the first weapon of war" - Field Marshal Montgomery

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  2. #12
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    Quote Originally Posted by BrigandTwoFour View Post
    I may be wrong, but....

    If the barrel is already touching the non-free float, then the harmonics would be different during zeroing anyway, thus the altered harmonics become the zero. If you were to remove the non-free float and put a FF tube on there so that the barrel was touching nothing, I imagine you would have the opposite effect and your zero would be off from when it had the non FF tube.

    Edit: At least, that's what my non-engineer but still pretty tech savy mind things. I'll stop deviating from topic now.
    Because the barrel is non-free-floated, it will change harmonics every time the handguards are gripped because of the force imposed on the barrel and because there's no way to ensure a 100% repeatable grip (so the forces vary each time you grip it). A reputed member of TOS did some testing and it was found that groups tightened, on average, .5" @ 100yds using a free-float vs a non-free-float.

    Their point is that covering the barrel with standard rifle-length handgaurds protects the harmonics from changing. On the contrary, the handguard will cause the average accuracy to decrease.

    In short, it's a load of marketing BS.
    Last edited by Skyyr; 03-26-10 at 18:34.

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