Adds in custom Extra attachment that will give optic rail + carry handle to M16

Equipping it will allow you to install optic above the carry handle.
Only available to M16 (who uses AMCAR lol)

Basic Skin + Skin code support

Thanks to Germantacos for texture help

As Always,

Requires BeardLib
Requires WeaponLib
Recommended M16 Front Sight

> Put in "mod_overrides" folder

Known Issue: