No, imho it is just a different ammo-loadout with no tracers as the experts used.
No need to advise your enemy that you are sitting in his six and did miss him with the first burst.
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Win 7/64 Ult.; Phenom II X6 1100T; ASUS Crosshair IV; 16 GB DDR3/1600 Corsair; ASUS EAH6950/2GB; Logitech G940 & the usual suspects

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