A little while ago OutdoorHub covered the double-barreled 1911 pistol from Arsenal Firearms, and this is possibly the closest we will ever get to the same thing on the AR-15 platform. Demonstrated here by Tony Rumore of Tromix, this “Siamese 223” can handle a mag dump like no other.

“The latest and most insane creation by Tromix is this Siamese 223 for LAW Enforcement only,” states the Tromix website. “The synergistic exchange of gas tubes forces the expanding gasses from the lower rifle to the top rifle allowing it to cycle a cartridge into the top breach [sic] then fire when the bolt is closed. The gas from the top rifle is then sent back down to the lower rifle where the first empty round gets ejected and a new cartridge is loaded into the breach.  It is a wicked wild ride when fired FULL AUTO.”

Tromix has also worked on projects such as a muzzleloader AR-15 and a bolt-action pistol. You can find more of their creations on their Facebook page.

Image screenshot of video by Bob Ash on YouTube

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6 thoughts on “Video: The “Siamese” M16

  1. Law enforcement only? Really? Bullshit. That is not something that LE could or ever should use. It’s an exercise in engineering, nothing more.

    1. Ferguson Police may be ordering a few for the Thanksgiving Week when the Grand Jury announces no charges against the Officer! The could be useful….

    2. “LE ONLY” is shorthand for a post-sample machingun, Dan. It has nothing to do with cops, it’s just the language of machinegun manufacturers.

  2. Reloading would be the only way to economically feed it, and even on a progressive press it would get tedious. Great exercise in engineering, though.

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