How to install: Pickaxe
1. Start OpenIV 
2. Go to Grand Theft Auto V / update / x64 / dlcpacks / patchday3ng / dlc.rpf / x64 / models / cdimages / weapons.rpf 
3. Replace w_me_bat.ydr and w_me_bat.ytd
4. Enjoy!

How to install: Damage
1. Start OpenIV 
2. Go to Grand Theft Auto V / update / update.rpf / common / data / ai 
3. Replace weapons.meta
4. Enjoy!