Lighter

&nbsp A lighter is a device used to produce a flame, namely as a way to light candles or cigarettes/cigars.

Big Boss/Zadornov
When Big Boss was stationing his private military group, the Militaires Sans Frontieres, on the Barranquilla Coast in Colombia, he had a lighter. However, it frequently shorted out, being unable to produce a flame, which forced him to temporarily quit smoking on at least one occassion. Eventually, he grew fed up with it not working during a meeting with Ramon Galvez Mena, and decided to talk with Mena. Likewise, Ramon Galvez Mena, real name Vladimir Alexandrovich Zadornov's right hand prosthesis acted as a lighter, because when he got it after completing a mission for the KGB, he was a heavy smoker, although he admitted that he no longer had much of a use for it since he quit smoking. After Zadornov's death, due to Big Boss killing him in self defense at the firing range, he utilized Zadornov's red prosthesis as a new lighter.

Solid Snake
Nearing the end of Operation Intrude F014, FOXHOUND Operative Solid Snake was forced to fight Big Boss without any weapons (as he was forced to dispose of them earlier due to their being caught aflame after being caught in Metal Gear D's explosion). Solid Snake eventually managed to find a sterling-made Zippo lighter while using IC card keys strewn around the area of his and Big Boss's fight. He later used this and a "Mrs. Spray" brand Lacqeur spray to create a makeshift flamethrower to immolate Big Boss alive.