The VG Resource

for a while now i have attempted to rip the models from Timesplitters 3 (Gamecube) using 3d Ripper DX with no luck and recently im attempting to extract via files, however Free Radical used .PAK files in which are not a universal file per game bases. i would like to ask if anyone knows how to open those types of files and get the models to a usable state

update since i've been asked to supply the .pak that i'm needing help with, there's also a .c2n file but i am unaware if its necessary  

https://www.dropbox.com/s/s5pm4hdw5hz4ur1/gun.rar?dl=0