Japanese submachine guns are a an especially unknown edge of firearms history – the most common model is the type 100, and ever that is exceedingly rarely today. So us were pretty interested as soon as we uncovered a report from British troops in India on a caught Japanese SMG. The report is dated February 1946, for this reason this particular gun was most likely not encountered in combat.

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" data-image-caption="Japanese version II type A variant 1 SMG with mags

" data-medium-file="https://i1.wp.com/www.katifund.org/wp-content/uploads/2012/10/smg.jpg?fit=300%2C217&ssl=1" data-large-file="https://i1.wp.com/www.katifund.org/wp-content/uploads/2012/10/smg.jpg?fit=592%2C429&ssl=1" loading="lazy" class="size-full wp-image-5082" title="Japanese design II form A variant 1 SMG" src="https://i1.wp.com/www.katifund.org/wp-content/uploads/2012/10/smg.jpg?resize=592%2C429" alt="Japanese version II form A different 1 SMG" width="592" height="429" srcset="https://i1.wp.com/www.katifund.org/wp-content/uploads/2012/10/smg.jpg?w=592&ssl=1 592w, https://i1.wp.com/www.katifund.org/wp-content/uploads/2012/10/smg.jpg?resize=150%2C108&ssl=1 150w, https://i1.wp.com/www.katifund.org/wp-content/uploads/2012/10/smg.jpg?resize=300%2C217&ssl=1 300w, https://i1.wp.com/www.katifund.org/wp-content/uploads/2012/10/smg.jpg?resize=400%2C289&ssl=1 400w" sizes="(max-width: 592px) 100vw, 592px" data-recalc-dims="1" />Japanese version II type A different 1 SMG v mags

As best we deserve to tell indigenous our solitary reference book on this kind of thing (William Easterly’s Japanese Submachine Guns), this is a model II, type A, variant 1 gun. The straightforward design (the version II) was very first built in 1934, and also was the brainchild that the prolific Japanese eight designer Kijiro Nambu. It to be chambered because that the typical 8mm Nambu pistol cartridge, and was initially listed with 50-round magazines. We’ve never ever handled one ourselves (nor have actually we checked out one in person, actually), yet on record it appears to be a really slick small gun. The barrel was 9.5 inch long, and the as whole weapon just 26 inches long and also 6.25 pounds. It operated on a basic blowback principle, and the 30-round magazines detailed on the kind A version are a great compromise in handling and firepower (the 50-round mags were really too big for convenient use). The light 8mm Nambu cartridge to be not specifically effective in combat, yet it would certainly make because that a an extremely light recoiling weapon, and also the sights are far better than many modern SMG designs.

A distinct feature the this and also other beforehand Japanese SMG draft is the usage of an flexible buffer assembly. As the bolt paris backwards after firing, it is captured by a piston connected to a compressed-air buffer in the behind of the receiver. As the bolt pushes backwards, waiting in the buffer deserve to only escape through a tiny valve, which has multiple various sized holes which the shooter can select from. This allows the bolt velocity to it is in controlled, thus giving the shooter regulate over the gun’s rate of fire. Ours reference publication says the rate deserve to be 500 or 600 rpm, but the initial report states the buffer has actually five different holes to choose from.

Another interesting feature the this specific variant that the model II (the kind A variant 1), is the it was arisen in 1942 for use mounted on a vehicle. A steel nosecap v a big round lug is clearly shows just listed below the muzzle, and also the ideal side the the receiver has a big metal plate through a 2nd attachment point. What auto this was intended for, us don’t know.

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The model II SMG to be an experimental design in the advancement of what would ultimately be adopted as the form 100, and it likely never saw combat. That this one was even found by British forces after the war is a bit surprising.