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Thread: LMT 10.5'' which buffer to use??

  1. #11
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    The 10.5" carbines have a very short dwell, and they have relatively large gas ports to get a quick burst of gas to operate the system, instead of getting a longer gas charge from normal dwell.

    As a result, this can get things into motion more quickly and perhaps violently, and that's why the heavier buffers are preferred in these 10.5" applications.

    The heavier buffers will tend to help delay your extraction slightly and to make the cycling slower. This is good.

    However, the actual energy imparted to the system from the gas is the same, and even if the heavier buffer takes a little longer to get going, and goes slower, the energy being transmitted rearward is roughly the same as with a lighter buffer, except slower.
    Sort of like light and fast, vs heavy and slow. Different ways to transfer the same energy.
    When it hits the back end of the buffer tube(and consequently your shoulder) it will transmit that same amount of energy(roughly) as the lighter buffer would have. Slightly less sharp perhaps, but more inertia and more "shove" to it. Just as it didn't really want to get into motion right away, it doesn't really want to stop right away either.

    So, if you want to help with the recoil reduction and muzzle-rise, then you're going to need a buffer with a recoil-reduction function built into it.

    The MGI RRB (RateReducing/RecoilReducing Buffer) is made for these types of applications, and consists of a heavy(7.1 oz.) buffer with a mechanical tungsten weight and spring system which is activated at the back end of the recoil stroke by a very short plunger in the buffer tail. This sends the tungsten weights into forward motion inside the buffer body, to strike the rearward moving parts just prior to bottoming out at the back of the buffer tube, and cancels a large portion of the recoil, and spreads-out the impulse of whatever recoil might be left.
    And it has the delayed extraction and slower cycling benefits of the 9mm type buffers too.
    And the tungsten weight system also performs to eliminate any bolt bounce.

    It will provide better cycling characteristics, less recoil, less muzzle rise, and overall better controllability of the weapon, especially during rapid fire sequences. Works equally well in semi-auto or full-auto.

  2. #12
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    Sorry for the necro post here, but can anyone verify the info in the last post by TWL? It has been my understanding that pneumatic buffers, etc. are all "voodoo" and "snakeoil."

    "Addressing the problem of shootings by ban or confiscation of non-criminal's guns is like addressing the problem of rape by chopping off the Johnson of everyone who DIDN't rape anyone while not only leaving the rapists' equipment intact, but giving them free viagra to boot." --Me

  3. #13
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    MGI buffers do slow down cyclic rate and felt recoil. Its all physics. They do as advertised. The problem is that they can be more ammo sensitive. Lower pressure ammo may not function as well.

  4. #14
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    I've been running an H buffer in a 10.5 mrp. Runs great both suppressed/unsuppressed. Using 855 ammo. recoil is almost unnoticeable.

  5. #15
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    I've been really happy with the spikes buffer in my LMT 10.5 so far. Eats any type of ammo I throw on it.....
    FFL/SOT

    Chuck Norris has to maintain a concealed weapon license in all 50 states in order to legally wear pants.

  6. #16
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    Does the stock buffer on these really need to be replaced or is it good to go from the box?
    "Life is short, but the years are long." - Robert A. Heinlein

  7. #17
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    Use LMT Enhanced BCG, that's what it's made for.

  8. #18
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    I have an H2 in my 10.5" LMT and it runs perfectly regardless of what I have the Switchblock set at (factory LMT 10.5" barrel, Switchblock installed after-the-fact), or whether it has a suppressor on it or not.....with any ammo.
    Last edited by hatidua; 05-29-11 at 13:24.

  9. #19
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    Quote Originally Posted by mikeahe View Post
    Use LMT Enhanced BCG, that's what it's made for.
    I was told by LMT not to use that group in the 10.5 upper...
    FFL/SOT

    Chuck Norris has to maintain a concealed weapon license in all 50 states in order to legally wear pants.

  10. #20
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    Quote Originally Posted by 99HMC4 View Post
    I was told by LMT not to use that group in the 10.5 upper...
    I think their web site says not to use it on anything shorter than 14.5"
    "Real men have always needed to know what time it is so they are at the airfield on time, pumping rounds into savages at the right time, etc. Being able to see such in the dark while light weights were comfy in bed without using a light required luminous material." -Originally Posted by ramairthree

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