Just a few ideas.
I understand there are some variations of ammo already but adding a hallow point to pistol calibers would be cool.
Also a list of only a few guns.
G36
Fal
Galil
Sr22.
Aa12 Shotgun?
Maybe add auto glock or burst fire barretta .
Bows and arrows(already mentioned)
Camera for bases
Mountain Lions?
Maybe bleeding traps