2. Snipers- These are obvious. For bolt actions, M40A3 from MC2 and the X6 from MC4 with decent-low fire rates, 1 hit kill shots, and you know the rest.
Then, semi autos. The Dragonov from MC2 is great. The E24 SASR is NOT needed.
They could add an innovative gun, like a break barrel or something.
3.SMGs- An UZI would be good with low damage, high rate of fire, and low recoil. Next, a MP5 with lower rate of fire, higher damage, and more recoil than the UZI. An AK-74U with balanced stats. Finally, a Bramson with slightly lower overall stats.