Phone wallpaper m16, assault rifle, led (photo, picture)

AK 47 and FN Fal are ancient, but they are one of the most resistant to water (sweet or salty), mud, cold and heat.
Fast and inexpensive maintenance (spare parts). Its ammunition is in ambundance, is effective and very affordable price.
Both have been used in many conflicts and have not left anything to be desired.
The negative factor is its size and because it does not contain rails to be able to dock peripherals.