def instantiate(self, **extra_args):
        """ Instantiate the model """
        input_block = self.input_block.instantiate()
        backbone = self.backbone.instantiate(**extra_args)

        return NoisyQModel(
            input_block, backbone, extra_args['action_space'], initial_std_dev=self.initial_std_dev,
            factorized_noise=self.factorized_noise
        )