LAW M72 V0.2 and v0.3

Anti-Tank, Area effect, Cold War, LAW, War on Terror, Weapons

For those of you who have been following the blog for some time, you may remember the first rendition of the LAW M72 light anti-tank weapon built out of plastic tubing and fibreglass. Since then Vintage Airsoft has been working slowly in the background on several anti-tank weapons including an improved version of the LAW.

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When we say a while, we mean it. This is a photo of the new trigger mechanism housing being bent into shape in the old workshop.

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The housing in shape.

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When products are in development, they undergo a LOT of tweaking and changes in design, this photograph is a case in point. A dramatic change to the design of the shell meant that the original spacer would no longer fit, making it time for a gaffer-tape based solution.

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One of the modified trigger units straight after being brazed.

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This is the sear bar straight after being brazed. The protrusion nearest the camera is the sear, which is pushed down inside the tube above and allows the bar to slide forward under spring tension.

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The sear unit in position under the trigger mechanism housing. At the back is the wire that actuates the firing pin.

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Here you can see the firing pin (screw) and the actuator rod that the wire pulls to depress the pin. It certainly isn’t pretty but it did work. However this mechanism would be unsuitable for field use as it is unsafe to drop. However the principal can be applied to a more elegant system…

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The new trigger mechanism. The transfer bar is pulled forward by a tension spring and is controlled by a sear activated by the trigger.

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In place on the launcher, the tabs attached to the trigger unit can be welded down. The trigger unit can still be removed by undoing the screws and lifting straight out for servicing. There is also a tab that lines up with the hole in the cocking handle through which an R-clip or pin will be inserted as a safety catch.

 

And finally, painted up for testing! This will be painted green for production, but as it is a prototype the finish just needs to protect it from the elements.

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If this product is of interest to you, please do get in touch at: enquiries.vintageairsoft@gmail.com or join us on our Facebook page. Don’t forget you can buy our complete products via Etsy.

 

Oh, for those of you who want to see/hear the dry-firing….

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Rifle Grenade Prototype

Area effect, Cold War, Rifle grenades, WWI, WWII

Following my last post about rifle grenades I thought I would show the prototype in a bit more detail.

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The power plant for this system is a 40mm CO2 grenade. I have used the S-thunder mini grenades for this build but there is no reason the design couldn’t be used with a different grenade.

So, how to use! Open the chamber by pulling out the barrel.
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Insert your loaded grenade:

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Insert the barrel. Have the barrel face downwards to stop premature firing of the grenade. The grenade is locked securely in place when the polished steel is no longer visible.

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And bang, you’re ready to go!

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This prototype is for my M14, though I would love to make some more of these for other rifles. You can see the video with the initial test firing below:

 

Let us know what you think in the comments, on Facebook or email us on  enquiries.vintageairsoft@gmail.com. We will develop these for other rifles as they are requested so let us know if you want one!

 

UPDATE: Since this post was made initially, I have also started development of a rocket to go on it. The rocket in the attached video is only an initial prototype and improvements will be made as time goes on.

Rifle grenades-Introduction

Add-on kits, Area effect, Cold War, Rifle grenades, Weapons, WWI, WWII

Firstly, apologies that it has once again been an age since I last posted. I’ll be updating what I have been up to over the last month this week.

A slight diversion from the usual this time, the rifle grenade was developed in the early 20th century to allow soldiers to launch grenades further than they could throw. This technology would fill the gap between hand-thrown projectiles and small bore mortars until the 1970s, when dedicated grenade launchers became popular and the 1980s when underslung grenade launchers became widespread.

The rifle grenade first saw extensive use in the Great War where the high trajectory required to land a projectile in the enemy trench and short-medium ranges between opposing forces made them an ideal area-effect weapon where mortars were not available.

In airsoft, gas powered 40mm grenades are popular with modern players who are able to use them for room clearance and area-effect. However the M203-type launchers are entirely unsuitable for WWII and other pre-1970s era airsoft games. Anyway, this is my prototype answer to those who want to add a bit more ‘oomph’ to their semi-auto or bolt-action. More to come on this concept.

 

I’d really like to build these for WWII airsoft rifles, if you would like to be a test subject let me know! Our email is: enquiries.vintageairsoft@gmail.com or you can contact us through our Facebook page!

M72 LAW outer shell

Anti-Tank, Cold War, Custom builds, LAW, Weapons

For those of you with excellent memories, you will remember the LAW M72 project I had going on. It was at a stage where it looked a bit like this:

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Since then, progress has been made, the trigger mechanism housing (above) is now mounted on the pipes that make up the main launcher. A healthy dose of poly-cement tacked it in place so it would stay still for the permanent fixture.

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A close-up of the trigger and rear sight. The sight units are laser cut and the trigger made from Polymorph.

_DSF5390The whole unit after poly-cement. Looks a bit rough, but I have a solution to that!

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Fibreglass. Vile stuff but very useful for lightweight constructions like this. For the uninitiated, fibreglass is extremely fine strands of glass formed into sheets. These sheets are bound together with epoxy resin (the really nasty part) to form a stiff, strong structure. Carbon Fibre is the same idea.

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To get the sheets into all the detail areas I had to cut the coarse mat into strips before applying the first covering of epoxy. Epoxy underneath, apply the mat, apply more epoxy. Don’t use your nice paint brushes for this folks, they ain’t coming out of it alive!
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After the first couple of layers, I left it to dry for a bit so I could flip it over and do the bottom.

No pics for that, much the same process as the top! Once dry, I applied more resin and a finer sheet of fibreglass mat. The coarse grade is seriously uncomfortable to hold so this will provide a smoother finish.

The last coat is now drying, results next time!

If this has interested you at all, do drop us a line! We will be developing further anti-tank airsoft guns, if you have one you would like email us at: enquiries.vintageairsoft@gmail.com!

M72 Trigger mechanism housing

Anti-Tank, Cold War, Custom builds, LAW, War on Terror, Weapons

Yesterday and today I have been working on the trigger mechanism housing for the M72 rocket launcher.

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I started off by heating the plastic on my home-built vacuum former heater, which was very effective except for the outside 10cm of the plastic which was frustrating as this was exactly where the edge of my mould sat at both sides! If I had been switched on instead of enjoying the exotic fumes produced in my under-ventilated workshop I would have moved the mould so that it sat diagonally rather than straight but what’s done is done!

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After a few false starts I got the plastic soft enough to work and formed the rough shape. However either the seal wasn’t good enough, the suction too weak or the mould not being well ventilated enough to pull in the plastic onto the details.

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As a result I spent this afternoon with a heat gun and a short plank pushing the plastic onto the form.

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Looking a bit tidier now though I say so myself!

In future I’m seriously considering just building this part from fibreglass like the original, I doubt it would take as long and it can’t be more unpleasant fumes-wise!

*DISCLAIMER* Don’t try this at home, parts of this build are not good for your health and come with a fire risk built in.

LAW M72 update

Anti-Tank, Cold War, Custom builds, LAW, War on Terror, Weapons

I’ve been working quite hard on the LAW rocket launcher this month so far, with lots of plastic work!

I had the fortune to find two pieces of pipe which had corresponding inside and outside diameters, allowing one piece to slide snugly inside the other. My client had a model of an earlier type of LAW and had sent me the trigger mechanism housing from it (in green below) to work from.

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I created a wooden mould from photographs of the A7 in order to be able to form this complex shape. My initial idea was to build a vacuum former but before going to the expense of doing that I thought I’d have a go at forming with a heat gun…
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Pushing the plastic into the former.

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My second attempt, getting the sharp edge in front of the trigger is pretty well impossible with this technique without splitting the plastic or creating a crease so it looks like I’ll have to build a vacuum former after all!

I also ran some tests on nerf balls to see how they performed ballistically. When put in the end of the 50mm bore tube I was planning on using for the barrel it barely fell out the end when the grenade was actuated. I then tried a smaller bore pipe which sat just around the end of the nerf ball. This produced a much better effect, shooting it maybe 10 yards.

I decided that a slightly different approach was needed. I have been playing with the idea of expanding foam rockets as an inexpensive, disposable missile system. I made a mould up from some plastic tubing…

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The three components: the body tube (top), nosecone former (bottom right) and the backcap (left). I have inserted the tail fins into slots at the top. I am yet to make a rocket from it yet however! I think that this will produce a more ballistically viable rocket that will also be cheap to reproduce if lost.

LAW M72 trigger mechanism

Anti-Tank, Cold War, Custom builds, LAW, Products, War on Terror

Video giving a behind-the-scenes view of a bit of R&D at Vintage Airsoft. Although it doesn’t look much yet, a far more polished version of this unit will feature in a custom-built LAW M72A7. Apologies in advance for referring to it as ‘L72’ in the video repeatedly!