I've noticed weird stuff with this weapon. Deterioration is decreasing visible DMG stats!
Once you equip FN FAL with 100% condition, it shows 23-34 DMG in "Inventory" stats. But when deterioration kicks in, it lowers visible damage acordingly to deterioration. So, weapon with 50% deterioration will show 12-17 damage in "inventory".
Also, FN FAL shows "fast reload" perk, yet it ain't there,