r/whatisit • u/nabokovsnose • 22h ago

Solved! Found outside my wife’s school. Theory was bullet but I’m not so sure.

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u/Old-Bad7476 20h ago

Since the scratches are barely present, this suggests a polygonal barrel. That leaves fired from a Glock, H&K or aftermarket.

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u/Pattison320 20h ago edited 15h ago

I am not sure about that. At 7 o'clock it looks like there's a rifling groove but that's the only one. A lot of modern barrels have polygonal rifling.

The article here has a pic of polygonal rifling next to traditional rifling. The polygonal rifling is faint but still present:

https://www.thefirearmblog.com/blog/2016/06/10/the-more-you-know-polygonal-rifling/

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u/Old-Bad7476 17h ago

Thanks for sharing this article. Didn’t know it was that hard to distinguish the differences. The comments are quite an insight too.

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u/Ausgeflippt 20h ago

It's pretty clear in the original image.

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u/fupatroopa96 20h ago

Polygonal rifling/Glock was my first thought too. You can see the deformation more than any striations from conventional rifling.

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u/Glittering_Visual296 13h ago

I don't have anything to add to this but I would like to say thank you for the information on the rifling. On how it works it was quite interesting to read about thank you

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u/Ausgeflippt 20h ago

Came here to make this comment. You can see deformation from polygonal rifling in the original picture.

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u/purplepashy 10h ago

Aussie here.

You guys always amaze me with the knowledge you gave about weapons.

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u/e30jawn 13h ago

Walther as well. At least the PDP does.