Incredibly powerful spudguns

Steve Johnson
by Steve Johnson

I did not realize that physics would allow spudguns to achieve the level of power achieved by Sureshot’s guns cannons.


Most of Sureshots guns operate by injecting Methylacetylene-Propadiene gas into an expantion chamber and then igniting it.

The BL-415, which uses the Methylacetylene-Propadiene gas system, can generate up to 450 ft/lbs of muzzle energy. That is around the same muzzle energy of a .45 ACP round!

For comparison, the FN 303 less-lethal launcher generates just 16-24 ft/lbs of energy. The most powerful “less” lethal 12 gauge, 37mm and 40mm rounds top at just over 100 ft/lbs. The Sureshot guns could not be considered less-lethal.


The 60″ long tennis ball sized barrel of the BL-525 can generate 2000+ fl/lbs of energy if loaded with a proprietary 4090 grain UHMW/steel projectile. That is more energy than a 6.8mm Remington SPC cartridge!

Impressive? You have seen nothing yet … The below video shows a proof of concept developed for a Mexican defense contractor. It fires a 6790 grain projectile and generates 3000 ft/lbs of muzzle energy!!! That is more than a .308 Winchester!

Check the legality of spudguns in your state or country before you embark on building one.

Steve Johnson
Steve Johnson

I founded TFB in 2007 and over 10 years worked tirelessly, with the help of my team, to build it up into the largest gun blog online. I retired as Editor in Chief in 2017. During my decade at TFB I was fortunate to work with the most amazing talented writers and genuinely good people!

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  • GDFRS GDFRS on Nov 06, 2011


  • GDFRS GDFRS on Nov 06, 2011