Simple mod question..

[caron300]

i would like to know where the tip on this gun.. The head, where the bullets fire XD. Yup its a choob question but i would like to make a mod not over the whole gun and i cant know which part is where.. Also if someone can explain me which other parts are where

Screenie:

[thegreatn00b]

if i remember well it the hole on the top

[Fireflight]

do it like me make stripes through this picture start ur game with mod and then look what colour this piece has that u wanna find and the u have it