  We analyze the mass spectrum of spin-2 excitations around the gravity duals
of "linear quiver" supersymmetric conformal field theories (SCFT's) in six
dimensions. We show that for the entire family of gravity solutions it
satisfies a bound which corresponds to a unitarity bound for the scaling
dimension of the dual field theory operators. We determine the masses of
excitations which belong to short multiplets, and for certain gravity solutions
we obtain the Kaluza-Klein modes and the corresponding mass spectrum, fully and
explicitly. Finally, we discuss an intuitive picture of the dual operators in
terms of the effective descriptions of the SCFT's.
