Abstract: A deflector assembly for a spray gun includes a mounting collar and a pivotable deflector blade. The mounting collar has a plurality of locking tines, or fingers, for permanent snap engagement about a spray nozzle. The mounting collar further includes a support tube with a pivotable groove on an upper surface and a pair of locking detents on a lower surface. The mounting collar is rotatable about the spray nozzle. The deflector blade comprises a locking retainer having a pivotal shoulder of a complementary shape to that of the pivotal groove of the mounting collar. The deflecting blade further includes a camming or prong lock capable of interengaging with the locking detents on the mounting collar. The deflector blade includes a plate member extending from the locking retainer having a planar impact surface on one side and a serrated surface on the other.