In order to reduce the potential fire load, polyamides are often compounded with flame retardant additives like red phosphor or halogen-, nitrogenous or phosphoric molecules. However, to achieve an effective flame retardancy very high amounts of the additives are necessary which can negatively affect the mechanical properties of the material or lead to a migration of the additive to the surface of the compound (in case the flame retardant is physically bonded to the polyamide). A new attempt to enhance the non-flammability of polyamides is the direct build in of the respective molecules within the polymer chain during the polymer synthesis. By applying this method, the flame retardant additives function as a chain regulator resulting in low molecular weights respectively low viscosities. Consequently, these polyamides are difficult to process. Therefore, in this work intrinsic flame retardant polyamides were compounded with a PC/PA-Blend as a linear chain extender in a twin-screw extruder. The compounds were characterized regarding their rheological, mechanical and flame-retardant properties. Rheological measurements showed that the viscosity of standard-polyamide was reached and that the chain extension was successful. Thereby, processing through injection molding was possible. Furthermore, a flame test was conducted by measuring the burning duration after two flame treatments. The experiments showed that the polyamide keeps its flame retardancy after the compounding process which makes the treated polyamide suitable for conventional industry applications.