No, it's essentially a BoomPro clone that uses a 2.5mm jack instead of a 3.5mm jack - Here's another example.
Having said that, I personally don't think the m40x makes for a good gaming headset option. But the choice is yours.
I currently own the 9500, SV007, X2/HR, L2, H6gen.2, and MSR7 and have at least tried a few of the others. Feel free if you have questions on any particular model.
Reposting because automod deleted my original comment;
I wonder if they make something like that for ATH-M50X since I already have a pair of those
Edit: audio technica makes one for 80 dollars but it's not even actually a wire replacement. Found a generic one that actually does the trick.
Excellent headphones. Used them for a few years. You'll. Need this too.
Cable Boom Microphone - Volume Control for Playstation PS4 or Xbox One Controller, PC - Boompro Gaming Mic Compatible with Audio Technica ATH-M50x, ATH-M40x, ATH-M70x Headphones(150CM) https://www.amazon.com/dp/B07VZBVJKL/ref=cm_sw_r_cp_api_i_LBYlFbJTEG4WG
I have the m40’s and got this. Cable Boom Microphone - Volume Control for Playstation PS4 or Xbox One Controller, PC - Boompro Gaming Mic Compatible with Audio Technica ATH-M50x, ATH-M40x, ATH-M70x Headphones(150CM) https://www.amazon.com/dp/B07VZBVJKL/ref=cm_sw_r_cp_api_i_xcQlFbDJV15V1
Not OP, but I have m40x’s and bought this modmic and it’s worked incredibly well. Crisp sound and an in-line mute button - I would recommend it 10/10 times.
According to this Head-Fi post, any cable compatible with the Audio-Technica M50x will also fit the 8400:
https://www.head-fi.org/threads/the-krk-kns-8400-and-6400-appreciation-thread.590193/post-10333544
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So this boom mic, with the AT connector, should be a good place to start:
https://smile.amazon.com/gp/product/B07VZBVJKL?psc=1
ATH-M70x with boom mic?
Actually, good thing you mentioned it. It's not the vmoda boom pro mic. I bought this alternative. That one came with an adapter that works with the headphones. https://www.amazon.com/dp/B07VZBVJKL/ref=cm_sw_r_sm_apap_aqPatNEJJD5pa
There is a third option. This is what I use with my M50X's
https://www.amazon.com/dp/B07VZBVJKL/ref=cm_sw_r_cp_api_i_wWZfFbHG0BEZ6
https://www.amazon.com/dp/B07VZBVJKL/ref=cm_sw_r_cp_apa_i_wYpfFbJEZ2CMV Whole lot cheaper.
I'm going to suggest buying the ATH M40X headphones with a boom mic. If you search Amazon for m40x boom mic it will come up. Been using this set up for a couple months and not looking back at gaming headsets. M40x with boom mic Here's a link to the mic which will have the headphones also. The mic is headphone model specific.
Cable Boom Microphone - Volume Control for Playstation PS4 or Xbox One Controller, PC - Boompro Gaming Mic Compatible with Audio Technica ATH-M50x, ATH-M40x, ATH-M70x Headphones(150CM) https://www.amazon.com/dp/B07VZBVJKL/ref=cm_sw_r_other_apa_i_vFCYEbPV3EP94