think it wuld work, but I guess I would ask WHY??? U have both but only one gun, but a coplete P9 and be done with it. If down the road u wanted to sell ur combo if would have to be sold as a combo, bur you could not buy from kahr the lower frame only to mate up with the slide and barrel that you have left. Ugot the best of the best with the TP, , IMO not worth it to go to a P9 which is smaller buyt not enough to brag about . Just sayin.