I was thinking perhaps bullets that explode after a certain short period of time. It would drastically reduce the shrapnel that would fall on Gaza...would raise the cost per bullet from say a dollar to several dollars though.
Hats off to you for knowing photons actually are subject to gravity...most don’t know that :-)
The trouble with a laser system is cycling the capacitor bank quickly enough...and heating.
Think of a pulsed CO2 laser system configured like a mini-gun (i.e. with separate laser tubes and with capacitor banks for each "barrel"/tube). Desired rate of fire optimized by number of tubes to take care of the capacitor recharge/heating difficulties.
Even a chemist has to know that photons are "subject to gravity".... ;^)