Maya Modeling Tutorial- TF2 SentryGun part 3

in this Tutorial you will get to learn how to model TF2 sentry gun. TF2 sentry gun is evolving by 3 levels and this model represent the first level in that evolution. the tutorial is not for beginners , but if you have time to follow it , aim sure that anyone with a bit of experience with maya can make it done. 3 reference pictures front/top/side links from my photo bucket account: front: top: