Tuning FX Maverick Sniper to Compact

I don't believe you can use your air tank on the compact. I have a compact and tried impact bottle won't clear the moderator. BUT

I guess you could screw end cap on barrel.

As stated above you have to change it to a koi or a few others that are same size as the shroud I've used a 480 on my compact impact don't see how the Maverick would be any different still needs clearance from the shroud so staying the same size as the shroud should buy you the clearance needed