Go to Open IV, click edit mode and search for w_me_poolcue. 

Replace the model in all locations to see it in game. Just be sure to copy any folder mentioned in search to mods folder before installing. 

Location 1: 
Mods-update-update.rpf-dlcpatch-mpbiker-models-cdimages-weapons.rpf

Location 2: 
Mods-update-x64-dlcpacks-mpbiker-dlc.rpf-x64-models-cdimages-weapons.rpf