Is that the dboys kar 98 or something else. I have replaced the grips on one of my lugers with real wood. Looks much better now. Takes a bit of dremel work as the replacements were made for a real grip.
Did you strip off the crappy varnish from the kar 98. Nice wood work underneath which you can paint properly. Got my luger grips from epic militaria. My kar 98 is a gas version rather than spring. A bit powerful