There is an Error in the Label. Correct Label is:
VOR GEBRAUCH
SPRENGKAPSEL
EINSETZEN
http://www.raeer.com/images/full/68613-WH-Stielhandgranate-T.gif
Keep up the good work.
You can't open binarized .p3d models. All Arma 3 .p3ds are binarized. You find unbinarized testsamples in the arma 3 tool Folder or follow this link for Arma2 samples
https://community.bistudio.com/wiki/Arma_2_Sample_Models