That completely depends on the Eotech model and where in relation to the Eotech this is mounted. It will likely be visible unless its mounted directly in front of the Eotech, but again it will depend on the exact model of Eotech and how far away the light is mounted from the red dot.
No, this will not fit an 18650.
This uses a 123A Lithium battery. It is easy to replace, you simply unscrew the cap to replace the battery.
Yes, this is the most recent version of these flashlights.
This will technically fit on a 5-slot rail, however we recommend 7 or more slot rails for maximum security and stability.
It mounts on any gun that has a 1913 rail. The tac 14 if I remember correctly has mlok slots so if u buy a mlok 1913 rail section to mount it on then yes it will.
It won't mount directly to MLOK as it has a picatinny attachment point. It will attach to an MLOK accessory rail very well.
Yes, this is the most recent generation of this light.
The Inforce unit will be a little bit darker than the Magpul FDE products.