Starting gun is pretty good, shoots pretty fast. I don't recommend using the semi-auto sniper rifles, the bolt action rifles are better. Aim for the head and you'll insta kill people. You'll unlock new sniper rifles when you earned enough xp, pretty much every sniper rifle is good. Kar98k and Krag-Jorgensen are long range snipers and the Gewehr 95 is better for mid range. All sniper rifles can be used for every range though. I'd recommend putting a medium scope on the rifles, most versatile scope imo.