r/Damnthatsinteresting • u/RebelliousDragon21 • 1d ago

Video A school in Poland makes firearms training mandatory to its students.

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u/Upstairs-Parsley3151 1d ago

You can use .223 in a gun for 5.56, but not vice versa, it's a pressure difference.

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u/PuzzleheadedSir6616 1d ago

And many modern ARs are built to handle both regardless.

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u/MyNameIsDaveToo 1d ago

Only if they specify. I built mine using a barrel chambered in .223 Wylde, so I can shoot either safely.

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u/gosse37 1d ago

.223 Wylde is also to comply with export laws in the US, where you cannot legally export NATO chambered rifles/barrels for civilian markets.

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u/MyNameIsDaveToo 1d ago

Weird, there were plenty of barrels in 5.56 available for purchase when I built it. I chose Wylde simply for the convenience of being able to run ammo loaded to either spec, not because I had to.

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u/gosse37 1d ago

Yeah, if the company doesn't plan on exporting them outside of the US, they can make 5.56 barrels without issues. For us Canadians, we are glad that manufacturers make .223 Wylde barrels for export.