I found some modbutton's in stock but I am not sure exactly what to choose.

My current light is a 300 series from Arisaka with a momentary tailcap.

On the modbutton though it offers a series of different tail caps. I am not sure what is compatible with my light.

https://www.bigtexoutdoors.com/produ...d-button-lite/

Maybe I'm an idiot and am looking at the total wrong product but worth a shot.