Metal Gear Solid: Sons Of Liberty

I managed to get all the dog tags and unlock stealth orange wig blue wig ect; but i cant figure out what the orange wig is for? if anyone could help it would be apreciated.

[KILLALLSCRIBS]

awesome dude.. great job.. i can't believe that you did it.. (how long have you had the game) .. it is rare for people to spend so much time in that game.. i did.. but i got GTA III and got off it.. i still play it alot.. but not too much getting dog tags.. but i think.. correct me if i am wrong.. but the blue LONG one actually gives you unlimited ammo, but you have to have at least 1 bullet in the gun to fire.. and have it equipped all the time.. still useful.. but i like stealth.. i think that the orange one gives you unlimited ammo.. like it will say 99999/99999 no matter what when it is equipped and also gives you NO RELOADS.. thats right.. no reloads... so awesome..... but i am not sure... check it out.. and how fast can you beat the game..