Finally, facial hair is now accessible for the male MP ped! All of them were a pain in the buttocks to put through trial and error testing, but I was able to make them function to some extent. I don't expect to continue on this for a long (I have others to work on right now), so these will do for the time being. Enjoy:)

Note: All facial hair placement was based only on the John Marston parent model. As a result, any additional parent models will be clipped.

Use menyoo to access the beards in both the mask/beard and accessory/top categories.

Available hair:
Michael, Franklin, Trevor, and Hunter beards (trimmed)

The installation instructions are included in the readme file, which is a zip file.

Tutorials for importing/rigging items (thanks to Quechus13's tutorial).
It demonstrates a basic concept of how to build up materials, bind meshes, and rig them for GTA V. The same principle applies to any other thing of your choice (beards, hairs, etc.).

Prepare materials: https://youtu.be/eu- g9VdYVfU  
Rigging the model: https://youtu.be/86lyaL4qi3c 

Credits:
Modojo