John Nitpick here to uphold the mantle of unemployment and provide unsolicited feedback on other people's hard work.
The K41's laser being coaxial makes less sense - in my opinion - than the laser simply having it's own dedicated housing with an articulated mirror on the turret roof. A roof-mounted laser enables the expensive laser generator to be housed inside the vehicle, allows the installation of an articulated mirror (likely larger than that of a barrel-mounted laser, because the unit's weight is no longer slowing down vertical traverse of the main cannon), enabling the weapon to engage a wider range of targets with more precision (such as aircraft and missiles, something a full-size tank turret would struggle to track) and allows the mirror to pull double duty as a high quality sensor - something that a standalone unit on the tank barrel can't do.
The removal of a barrel-mounted laser would also allow the K41 to mount a coaxial machine gun - which is arguably more effective as an anti-infantry weapon to due to its ability to create a beaten zone visible to the enemy (thereby increasing the its suppressive capability), whereas the suppressive fire of a laser is less noticeable due to it's greatly decreased visual and audio signature.
Having a roof-mounted laser would also provide some gameplay alterations that I think would be interesting to play around - even if the laser can't engage the player directly, having it intercept munitions like rockets and spiderbombs would make the K41 much better in the heavily-armored standoff role its description seems to imply it is meant to fulfill. I personally think it would go a long way to detrivializing an enemy to whom my normal response is to sit behind a building and lob spiderbombs and grenades at.