The weapons you should have are
any remington or AWM
A glock
A flaregun
(Recommended but optional)
Shotgun
M4

Melee is not recommended due to the lack of damage and risk that the monkey will WWE body slam you so stock up on ammo

Items you should use
Bear trap
fireworks
propane or gas cans

Anything that will stun or hurt the monkey enough to lower its health or stop it from slamming you into the ground will do (drones)

Grab your friends and loot and head to any building
place tools that will explode or stun close to the door
place a camera close to the door
place a bear trap inside the building in front of the door
wait until night
make a lot of noise so monkey comes to check it out (fire your weapons twice Recommend sidearms and never shotguns or flareguns (you only need 1 person to shoot twice)
Tell one of your friends to stay on cams and alert you when monkey comes
once monkey enters he will step into bear trap
shoot the explosives and stuns (if they are mid range all will explode or stun when one is shot)
magdump the monkey with your weapons
Monkey will still be alive and run away
if day and out of supplies gather supplies and go to a different building
only move at day not night
don't worry if monkey gets some health
now repeat the process until monkey dead don't forget you need a lot of ammo

you have learned how to defeat the body slamming monkey now remember this only works with the AI monkey because its dumb, player monkey will catch onto this strat and body slam your ass into the ground now go out there and kill big feet monkey