Weapon systems

Well M9k is a good basic one but its overused, there is CW 2.0 customizable weaponary with attachments and everything, it is popular but also can lag a bit, TFA has verity and is popular and is more optimized than CW, and recently I found ArcCW it has fewer weapons then the ones i mentioned but this one has more range with attachments and is pretty neato. I would say test them all and see what works with you