Do this "WiFi gun" actually work?

I can see 2 meanings behind this question

All right which element then

>do this
Third worlder detected

Might work, but making WiFi antenas is pretty difficult, frequencies are high, literally microns matter.

Worry don't. Good we speak English

better

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even more better

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A lot of the comments apply TV antenna theory and they shouldn't. This is a (long established) microwave reflector/director setup, and it doesn't matter that everything is electrically joined because the directors resonate at wavelength across the disk helping direct the radiation. Most gain however is coming from the simple reflector behind driven resonant exciter, matched by waveform so exciter resonates while reflector is on a null. 75 Ohm coax at microwave frequencies starts to act like a microwave pipe, so its a better match than at lower frequencies too. tl;dr search for backfire antenna, S-band antenna.

see youtube.com/watch?v=Be8agbgJ24s

McNeil is intentionally shading the WiFi gun - because he's got his own design, as shown above video. Both use the same principles and if you look closely you'll see he did a shit job of the dimensions for his gun.

Thanks

Wow. Ukrainian war zones a super cool.

Russia is a state of mind

Google 'Pringles WiFi antenna' for a cheap DIY version that works very well.

called a patch yagi google image search shows a bunch of circular disc versions similar to OPs