well i personally love it. and yes your kinda right on the everyone uses mg thing.
play them on obj based maps not tdms, they work much better since there no respawn xcept omaha.

tip 1. when using an smg up close try to move aroud the place move left,right,up,left it kinda confuses the other guy.
tip 2. always retreat then attack or let the guy fire all he likes then attack, it catches them by surprise i think.
tip 3. you only have 3 nades use them wiselu.
tip 4. know the map, this is a must
tip 5. when using kar its best you camp somewhere. m1 just be accurate.

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+azn gamers clan coming soon
+i am a renegade gamer