Japanese T89 ‘knee’ mortar

Area effect, Area-effect, Custom builds, Inter-War (1918-1939), T89 'Knee' Mortar, Weapons, WWII

I was recently given this replica T89 mortar replica to convert to fire TAGS. I hope someday to make my own from scratch with a bit more detailing and moving parts.

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The first step is to fit a firing pin. This is quite simple, I tapped two disks and threaded them onto a bolt to create a stable unit. This can be pushed down to the bottom of the barrel.

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The shells are steel tubes with custom-made caps. This is the prototype, there is a second hole in the production versions to allow quick refiling of the TAGs. The bottom plate is held on by spring pressure.

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There are two rows of spacers. The bottom one keeps the shell centred in the barrel, the top, thicker row allows the user to line up the shell before dropping it into the barrel for firing.

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The completed shells.

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I’ll be taking lessons learned from this design to apply to my other mortars and heavy weapons. I’ll also be offering these quickfill shells as an alternative to the standard 2″ mortar shells I’m providing with the SMBL mortar.

 

If you want a mortar of your own, 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.

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….