  KASCADE-Grande, the extension of the multi-detector setup of KASCADE, was
devoted to measure the properties of extensive air showers initiated by
high-energy cosmic rays in the primary energy range of 1 PeV up to 1 EeV. The
observations of the energy spectrum and mass composition of cosmic rays
contribute with great detail to the understanding of the transition from
galactic to extragalactic origin of cosmic rays, and furthermore to validate
the properties of hadronic interaction models in the air shower development.
Although the experiment is fully dismantled, the analysis of the entire
KASCADE-Grande data set continues. We have recently investigated the impact of
different post-LHC hadronic interaction models, QGSJETII-04, EPOS-LHC, Sibyll
2.3d, on air shower predictions in terms of the reconstructed spectra of heavy
and light primary masses, including systematic uncertainties. In addition, the
conversely discussed evolution of the muon content of high-energy air showers
in the atmosphere is compared with the predictions of different interaction
models. In this contribution, the latest results from the KASCADE-Grande
measurements will be discussed.
