That will run fine on anti siphon co2 with that badass back bottle setup. Just dont walk around the field pointing down when you arent shooting.
Leave it back bottle, that is ultra bitchin.
That is a great setup, I love it. That is definitely the tom kaye "because it is easier to remove the valve" air setup
The only thing I would do is buy a non foamie longnose bolt.
"I'll see it when I believe it"
PSA: Please don't use photobucket to post images. When you go through one of the older picture threads and find a lot of dead photo links, it is because of photobucket. They limit the amount of bandwidth your free subscription pictures can use, and then make the photo unviewable. Please use imgur.com or another free image host that does not ruin picture threads.