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Thread: Best Suppressed SBR Ever????

  1. #241
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    Grant, with my 11" .063 barrel, Ranger 2 and A5 buffer should I be using an LMT carrier? Do you sell them separately?

  2. #242
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    Quote Originally Posted by RyanB View Post
    Grant, with my 11" .063 barrel, Ranger 2 and A5 buffer should I be using an LMT carrier? Do you sell them separately?
    I would. We do sell them seperate.


    C4

  3. #243
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    Quote Originally Posted by TMS951 View Post
    I surely understand the reason the carrier works in a suppressed weapon. That makes sense to me. I don't doubt that.

    What I don't understand is why the enhanced bolt would not work. It is, from a technical stand point, a Superior bolt. What is the technical reason for it to hinder function in a weapon, and in what way does it hinder the function of the weapon?

    And since you do have so much experience I am interested in what problems the bolt caused that a standard one does not.
    I'm concerned about why it doesn't work, because the KAC E3 bolt DOES work, and it's weird.

    Maybe the LMT bolt has too much extractor tension. Like putting an O-Ring on a midlength gun. Whereas the KAC extractor does this, but has a different extractor claw profile, where it can sufficiently grip the cartridge casing.

    I don't know really, but I have a theory.
    We miss you, AC.
    We miss you, ToddG.

  4. #244
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    Quote Originally Posted by Magic_Salad0892 View Post
    I'm concerned about why it doesn't work, because the KAC E3 bolt DOES work, and it's weird.

    Maybe the LMT bolt has too much extractor tension. Like putting an O-Ring on a midlength gun. Whereas the KAC extractor does this, but has a different extractor claw profile, where it can sufficiently grip the cartridge casing.

    I don't know really, but I have a theory.
    If you look at Bill Alexanders post on the enhanced bolt. He says it does Not increase extractor tension but merely lower the springs K% for longer service life.
    On my trial I did use the enhanced bolt with the carrier on the 10 .5" noveske switch block I didn't have a malfunction except when you had the switch block set to suppressed and you DIDN'T have a suppressor attached [It would fail to lock the bolt back on the last round in the mag]. Now my personal opinion there is a couple of things occurring my first observation was that the ejection pattern was weak the cases would only go about foot to a foot and half with the enhanced bolt and the 10.5" noveske . The normal ejection out of the enhanced BCG out of my 14.5" upper is about 5' easy and as consistent as a sewing machine . All of this has to to be considered that I had close to 4K through that BCG before I did that test. My personal opinion is that the enhanced BCG is very tight for the first 500 rds robbing some cyclic energy [It could be the cause of the previous posters problem IDK for certain] but I can not say any thing for certain because it could be the ammo all of my tests were done using 5.56 pressure ammo. The ammo has not yet been said?

  5. #245
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    Quote Originally Posted by Thomas M-4 View Post
    If you look at Bill Alexanders post on the enhanced bolt. He says it does Not increase extractor tension but merely lower the springs K% for longer service life.
    On my trial I did use the enhanced bolt with the carrier on the 10 .5" noveske switch block I didn't have a malfunction except when you had the switch block set to suppressed and you DIDN'T have a suppressor attached [It would fail to lock the bolt back on the last round in the mag]. Now my personal opinion there is a couple of things occurring my first observation was that the ejection pattern was weak the cases would only go about foot to a foot and half with the enhanced bolt and the 10.5" noveske . The normal ejection out of the enhanced BCG out of my 14.5" upper is about 5' easy and as consistent as a sewing machine . All of this has to to be considered that I had close to 4K through that BCG before I did that test. My personal opinion is that the enhanced BCG is very tight for the first 500 rds robbing some cyclic energy [It could be the cause of the previous posters problem IDK for certain] but I can not say any thing for certain because it could be the ammo all of my tests were done using 5.56 pressure ammo. The ammo has not yet been said?
    I'm assuming ammo is M855, as that's what everybody is (or should be) using to test their stuff for function.

    Maybe the KAC extractor has more tension then.

    Dude: with a carbine receiver extension it's not supposed to lock the bolt on the last round in the magazine.

    However, I know for sure with 5.56mm ammo, and an .056'' port, A5 receiver extension, and A5H1 buffer it WILL lock back on the last round. I think it's because the added space that the carrier travels back into the receiver extension gives the magazine follower enough time to hold the bolt properly.

    Also, my casings are extracting farther now. Think the A5 kit could make an LMT Enhanced bolt work?
    We miss you, AC.
    We miss you, ToddG.

  6. #246
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    Quote Originally Posted by Magic_Salad0892 View Post
    I'm assuming ammo is M855, as that's what everybody is (or should be) using to test their stuff for function. Yes LC M855 and Privi M855

    Maybe the KAC extractor has more tension then.
    I believe you are correct that would be my guess to

    Dude: with a carbine receiver extension it's not supposed to lock the bolt on the last round in the magazine.
    Is this a brain fart The BCG still moves the same distance regardless of what buffer extension you use.
    the extra length is taken up by the longer buffers.
    Per Grants original post the BCG doesn't lock back because it is on the ragged edge of short-stroking attaching the suppressor adds just enough back pressure to lock the bolt back but only when the suppressor attached. Which was exactly my experience


    However, I know for sure with 5.56mm ammo, and an .056'' port, A5 receiver extension, and A5H1 buffer it WILL lock back on the last round. I think it's because the added space that the carrier travels back into the receiver extension gives the magazine follower enough time to hold the bolt properly. I believe it is because of the use of the rifle buffer spring it is a constant rate spring and slightly less spring rate compared to a carbine buffer spring.

    Also, my casings are extracting farther now. Think the A5 kit could make an LMT Enhanced bolt work?
    I cant say for sure but I believe it would help
    I haven't tried the A5 system yet but it is on my must do list.

  7. #247
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    Quote Originally Posted by Thomas M-4 View Post
    I haven't tried the A5 system yet but it is on my must do list.
    Shortbus moment: What do you mean by ''constant rate spring''?

    Forgot the A5 buffer was longer. God I'm stupid!
    We miss you, AC.
    We miss you, ToddG.

  8. #248
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    Quote Originally Posted by Magic_Salad0892 View Post
    Shortbus moment: What do you mean by ''constant rate spring''?

    Forgot the A5 buffer was longer. God I'm stupid!
    No worry I have brain farts every day 365 days yr

    Constant rate spring, I will try my best to explain if some else can do it better please step-in. In short constant rate springs have a specific compression rate per length of travel, a variable rate will change the poundage rate to length of travel at a certain point in the springs travel.
    Last edited by Thomas M-4; 06-29-11 at 23:52.

  9. #249
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    Quote Originally Posted by Thomas M-4 View Post
    No worry I have brain farts every day 365 days yr

    Constant rate spring, I will try my best to explain if some else can do it better please step-in. In short constant rate springs have a specific compression rate per length of travel, a variable rate will change the poundage rate to length of travel at a certain point in the springs travel.
    So you mean each coil could have a different spring length, or weigh more?
    We miss you, AC.
    We miss you, ToddG.

  10. #250
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    Quote Originally Posted by Magic_Salad0892 View Post
    So you mean each coil could have a different spring length, or weigh more?
    I knew what you next questions was
    This is were it might be out of my pay grade but I will try my best to give you the simplest explanation. Example constant rate 10lbs per inch of travel 3" of travel should equal 30lbs of resistance. Variable rate would be for example first 2 " at 10lbs per inch travel the last inch of travel would be 15lbs per inch for a total of 35lbs for 3'' of travel.
    Now this this is pushing it for me the longer rifle spring works in more of a constant rate compared to the carbine spring you have a longer spring to do the same amount of work. There is a bunch of math explaining this but I suck at math. http://en.wikipedia.org/wiki/Hooke%27s_law

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