The marking is Kar 98 in German fraktur letters.
I am not a pro on Mausers but if it is a real pre-1918 Kar 98 carbine, it was likely made by the Imperial Arsenal at Erfurt, maybe Danzig or Amberg, maybe by Mauser themselves.
It might retain proof markings and there might be an arsenal mark or national crest under the front scope base.
You do understand that it is a fully sporterized military surplus Mauser, don't you? There is nothing left of what came out of Germany but the receiver and bolt, maybe the trigger guard. Everything else was changed out to make it into a varmint rifle. The original manufacturer of the action is kind of immaterial by now.