EZ Gun
From the Metal Gear Wiki
The EZ Gun is a weapon that appears in Metal Gear Solid 3: Snake Eater. It is a small tranquilizer gun with a built-in suppressor, unlimited ammo and laser sight. By unknown reasons having this gun equipped raises Naked Snake's Camo index to 80 percent and lowers the consumption of stamina. (It can even cause stamina to increase if Snake is traveling light and standing still.)
The EZ gun can be obtained by capturing or killing all 47 types of plants and animals in the game, including the four medicinal plants. It is also found in Snake's backpack upon starting on the Very Easy difficulty level.
The EZ gun was created by Sigint from a base design of the FP-45 Liberator pistol given to the French resistance during World War II. Sigint comments that modeling the EZ Gun into the Liberator's shape was the hardest part of the weapon's design. When questioned why, he replies enthusiastically that it "looks cool". The gun's ammunition itself is silent, meaning that Snake never has to worry about its suppressor wearing out. While the EZ Gun can only hold one round, it has infinite ammunition and Snake can reload it as fast as he can cock the Mk.22. In real life, the Liberator took much longer to reload; the gun was actually faster to manufacture than it was to reload.
