Jagged Alliance 3 has two types of sniper rifles - light and heavy. The first group deals a little less damage but doesn't remove your Free Move at the start of the turn, making it overall a better choice since you will need to reposition fairly often.
In any case, Haemimont did make two fantastic heavy sniper rifles that are worth sacrificing the mobility, the first one being the M82 and the other one the Gold Fever.
Gold Fever is a unique weapon and therefore always drops in the same place.
Looting the Gold Fever
The prerequisite for being able to get the Gold Fever is that you go to Diamond Red mine in sector A2 before the big plot twist in Refugee Camp, so you can encounter Slave Master Graaf. If he's there, you will see him on the roster of enemies upon entering the sector.
Make sure you kill him and all his lackeys before they can execute 10 miners or you might suffer income issues later on. In any case, the main thing to do is to kill Graaf and loot the Gold Fever.
The weapon is not on his person. Instead, you will loot it from the rail guard on the balcony, next to Graaf.
Gold Fever characteristics
This sniper rifle has the second-highest damage in the entire game, second only to the M82. However, it only has one bullet at any given time so you have to recharge after every shot. The reload costs only one AP so it's not too bad but keep that in mind when calculating how many times you will be able to aim.
It is perfect for sharpshooters who camp in one spot as it provides a massive accuracy boost when prone.






















