Only Co2 and it is alright but compressed air is the way to go.
Tippmann X-7 with Remote Coil System
45/45 DXS Tank
Gives alot of shots also it works in cold weather.
There is no weaknesses
I have not used this on my Tippmann X-7 but i did use it on my Smart Parts Eiephany before i gave it back to the store. And got full store credit back. But the Dxs is a good air system. Some people like bigger tanks but I like this tank. It will work in cold weather and it is just better than CO2.