pulse lasers, they are weak but strong enought to kill even a zombear, they are good for idle firing and guarding your postion when you do something else (sleeping, cooking, repairing)
for more stronger weapon what use power try turbolaser cannon, far more cheaper (use more common blaster arm cbm instead of laser pistols and finger laser cbm)
both weapons are not too hard to craft or expensive (unless you want a lot of pulse lasers) and with solar panels you do not need to worry about ammo, when continously firing while large electric engine is working battery power last for long time and car batetries are realy common so after you hit 100% power it will stay near for long time