The internal-shocks scenario in relativistic jets has been used to explain the variability of blazars outflow emission. Recent simulations have shown that the magnetic field alters the dynamics of these shocks producing a whole zoo of spectral energy density patterns. However, the role played by magnetization in such high-energy emission is still not entirely understood. With the aid of emph{Fermi}s second LAT AGN catalog, a comparison with observations in the $gamma$-ray band was performed, in order to identify the effects of the magnetic field.