Here is the JBS manure spreader made into a AR attacher. There is 2 options in the store. One is for the manure box the other is for a Silage box. Which the other is for a silage box option this removes the beeters and adds box sides. With the silage box you have to open the rear gate to dump which is the same as the manure box.
Theres also an option to change colours of the main body and box extensions on the silage box.
Here is a giants ingame vovlo truck that works well with the spreader.
Credits:
Dkbmodding