LMG25: Build 2

Cold War, Custom builds, Inter-War (1918-1939), LMG25, Machine-Guns, Weapons, WWII

At the end of the last post, I had most of the large components roughed out for the LMG25. However the cooling ports in the barrel jacket are a little rough at the ends.

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So I welded the outsides edges, so I could grind them down and round out the ends.

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Next I welded up the ejection port.

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And the rear sling swivel, attached to the mount.

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The bipod was an interesting challenge. In order to go from the stowage to the deployed position the lugs all have to rotate, so a little tweaking was needed to make everything move freely.

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The end result is a pretty stable bipod with good movement, allowing the operator to sweep over an arc of fire.

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The dry assembly of the rear sight and ejection port. From this I learned that the ejection port needed a little trimming off the bottom to sit tidily. I also decided to chamfer the edges of the rear sight base to get a deep penetration for the weld.

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The foresight has been 3D printed, it screws into place on the barrel jacket.

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It sits just ahead of the bipod.

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The back-cap is also printed, I may replace this with a cast aluminium version now I have a working kiln.

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Most of the remainder of the work is now detail parts such as the rear sight unit, operating handle and the attachment for the back-cap. 

If you have a thing for obscure Swiss Light Machine-Guns then you can check out the pre-build piece here.

If you enjoyed this content join us over on Facebook and check out our Etsy store. If you have an idea for a custom build of your own get in touch on enquiries.vintageairsoft@gmail.com.

LMG25: Build 1

Cold War, Custom builds, Inter-War (1918-1939), LMG25, Machine-Guns, Weapons, WWII

The LMG25 is a really weirdly formatted gun, but with a Sten and some modifications I’m hoping to make something really interesting and unique.

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As ever, this started with a load of research and design work. There aren’t too many parts to this compared to some of my builds and they nearly all attach directly to the receiver. The first step of construction was to make this receiver, which I made a template for and centre punched for the drill, before cutting the space needed for the donor.

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The welding begins with the mock-upped ejection port and the trigger grouping/pistol grip.

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I also cut a hole for the magazine feed.

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The magazine well has an awkward and distinctive shape, so it is being 3D printed and will be mounted with metal plates and screws to the receiver.

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In place it fits quite nicely! This replica takes AK magazines which look the part well enough from a distance.

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Onto the stock. I cut it out in the usual way from the blank, but I can’t cut out the action recess in the usual manner due to the awkward lump at the front of the stock. It would have been possible to have this as a separate piece but it’s not a major issue to work around.
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The pistol grip unit is, fortunately, an entirely separate unit. This means making it is a lot easier than a one-piece pistol grip/stock. It somewhat resembles some of the early semi-auto conversions of bolt-action rifles in this respect of its design.

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There is quite a pleasing curve to the back of this pistol grip which is easily missed.

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This means that all the major working parts are in place. The next important step is to get the working parts actually working! Then we can enjoy the detailing, sights and bipod.

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If you have a thing for obscure Swiss Light Machine-Guns then you can check out the pre-build piece here.

If you enjoyed this content join us over on Facebook and check out our Etsy store, and if you have an idea for a custom build of your own just get in touch with us on enquiries.vintageairsoft@gmail.com.

The LMG25 Furrer

Cold War, Custom builds, Inter-War (1918-1939), LMG25, Machine-Guns, Weapons, WWII

The LMG25 is a Swiss Light Machine Gun adopted, as the name suggests, in 1925. It is a real oddity, even for a time when LMG designs were far less standardised than today.

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This Swiss soldier will get a very warm thumb if he opens fire now.

It was developed at Waffenfabrik, Bern by Adolf Furrer over seven years and was produced until the end of WWII. It served into the 1970s with the Swiss military, so must have been a pretty serviceable firearm to have hung around for so long.

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So, why is this an oddity? Well, the magazine is on the right-hand side, when most side-feeders (though not all) feed/fed from the left. There was a monopod at the back for support during sustained fire which wasn’t an uncommon idea at the time, but this could be moved to the front and used as a foregrip, which was.

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Monopod used as a fore-grip in the assault role.

But most interesting of all, this is a toggle-locked design. There are very few toggle locked guns due to the complexity and expense of manufacture as it is. There are even fewer rifle-cartridge toggle-locked guns (especially that went into production). As well as the high level of accuracy required for these to function, they also need to have a very strong recoil spring and a conventional toggle-lock doesn’t provide great purchase when cocking. The LMG25 has a separate operating handle to aid with this.

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The LMG25 is also interesting because as well as being toggle-locked it fires as you would expect a support weapon to do, from an open bolt. It is the only firearm of which I am aware that is both of these.

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The open toggle. When opened, it kicks open the two-part dust cover. Anyone familiar with the Luger will recognise the parts of this.

Just in case this wasn’t different enough for your liking, it is also unconventional in that the barrel does not stop once the toggle is broken open but keeps moving backwards. The shell is still ejected as the toggle moves much faster than the barrel.

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The dust cover in the closed position below, and open above. It is in two parts to fit around the toggle. Very Swiss. 

In spite of all this strange-ness and the alleged complexity of toggle-locked guns (over-egged by those who have spent no time with them) it is very simple to field strip. One large nut at the back of the receiver allows you to remove the recoil spring, then pull out the barrel assembly. What about the bolt? Well the bolt/locking mechanism is all part of the barrel assembly on this so the whole lot pulls out together. Neat for cleaning in the field.

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The barrel/bolt/locking unit, showing the extravagant fluting on the barrel normally hidden by the shroud.

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Top view of the toggle when removed from the receiver.

While beautifully made, this type of gun never really caught on. It served the Swiss well, where money was no object for a relatively small army but for any other military the expense would have far outweighed any advantages. 

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Of course due to never being adopted outside of its home country, which didn’t participate in any conflicts during this period (or ever since about 1847) it never saw active service so it is difficult to say how it would have performed. 

 

If you want to see some footage of the LMG25, Ian at Forgotten Weapons has a nice video talking through one in Belgium here:

He also has some awesome footage of another LMG25 firing, including a lovely bit of slow-motion:

Don’t forget to check out Forgotten Weapons’ page on the LMG 25 here for more information on the gun and high-res pictures.

Vintage Airsoft will be building an LMG25 over the next few months with progress posted up here.

 

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