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Lothar-Walther ultra lightweight barrels

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  • #1

    Lothar-Walther ultra lightweight barrels

    I thought some of you builders might find this rather interesting. Composite barrels are becoming more popular lately (and for good reason) to get rifle weights into the sub 6lb range. Lothar-Walther is on board now with their most recent offering:

    Lothar Walther gun and rifle barrels online shop - USA
    http://www.lothar-walther.com/396.php


    Ultra-Lightweight Barrels
    Finally, a super light weight barrel that is stabile during prolonged firing that does not involve carbon fiber, epoxy binders or any other heat retaining mediums. Beginning as an LW50 stainless blank, the barrel is precision machined to remove all excess weight. An outer casing of light weight alloys is machined and the two are fitted together. The two parts become one without the use of any adhesive elements. The end result is a perfect barrel for varmint and tactical uses that can be carried for long distances and stand up to heavy firing. The barrel will come complete with chamber, crown, breech threads and is fluted.

    With a shank diameter of 1.200” (except Savage versions) and a muzzle diameter of 0.850” this barrel will fill the needs of the varmint hunter and the tactical marksman. Unlike solid steel barrels, this barrel sheds heat fast. VERY FAST! Therefore, long days at the dog towns do not wear the barrel so fast. This barrel weighs less than half of what a standard varmint barrel of the same size weighs.

    Contact us for information on how you can order one of these barrels. This program includes the services of a specialist that is trained in building guns with these barrels. All calibres are available from .22l.r. to .338.
    "When the people find that they can vote themselves money, that will herald the end of the republic." -Benjamin Franklin
    "A democracy will continue to exist up until the time that voters discover that they can vote themselves generous gifts from the public treasury." -Alexander Fraser Tytler
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  • #2
    Holy schnikes. That's killer.

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    • #3
      Lothar-Walther makes some good stuff, but I don't imagine they'll be very cheap.
      "It's another burrito, it's a cold Lone Star in my hand!"

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      • #4
        i dont see how this is a good idea considering aluminum and steel expand at different rates.
        maybe it doesn't end up being that significant....
        but you would think POI shift during heat up would be present.

        or even friction between the two parts, but that is really over a long period of time which probably doesn't matter overall.

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        • #5
          Originally posted by futant View Post
          i dont see how this is a good idea considering aluminum and steel expand at different rates.
          maybe it doesn't end up being that significant....
          but you would think POI shift during heat up would be present.

          or even friction between the two parts, but that is really over a long period of time which probably doesn't matter overall.
          There are many types of aluminum. Don't quote me on this but I seem to remember the thermal expansion coefficient of 7075 aluminum to be less than that of certain steels. Which I'm willing to bet is the alloy they chose. I believe that 7075 and stainless are very similar in expansion. This is the whole reason most of the existing barrels are composite, because this is quite difficult to do. One of the methods is thermal bonding, where they cryo freeze the core, and super heat the sleeve. That causes a bond which shouldn't be susceptible to separation.
          "When the people find that they can vote themselves money, that will herald the end of the republic." -Benjamin Franklin
          "A democracy will continue to exist up until the time that voters discover that they can vote themselves generous gifts from the public treasury." -Alexander Fraser Tytler

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          • #6
            There's almost always a POI shift when a barrel gets hot some are just worst than others.
            "It's another burrito, it's a cold Lone Star in my hand!"

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            • #7
              Originally posted by 5.0_CJ View Post
              There are many types of aluminum. Don't quote me on this but I seem to remember the thermal expansion coefficient of 7075 aluminum to be less than that of certain steels. Which I'm willing to bet is the alloy they chose. I believe that 7075 and stainless are very similar in expansion. This is the whole reason most of the existing barrels are composite, because this is quite difficult to do. One of the methods is thermal bonding, where they cryo freeze the core, and super heat the sleeve. That causes a bond which shouldn't be susceptible to separation.
              7075, especially T-76, is extremely thermally stable. That is one of the primary reasons that it is the alloy of choice in many high strength, load bearing aircraft structures.
              "It is in truth not for glory, nor riches, nor honours that we are fighting, but for freedom - for that alone, which no honest man gives up but with life itself."

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              • #8
                Originally posted by helosailor View Post
                7075, especially T-76, is extremely thermally stable. That is one of the primary reasons that it is the alloy of choice in many high strength, load bearing aircraft structures.
                7 series aluminum alloys also get stronger with age.

                I have some LW AR barrels and I believe that the barrels that come on VEPR AKs are also made by LW. They are really top grade barrels.
                Magnus, I am your father. You need to ask your mother about a man named Calvin Klein.

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