I ordered a barrel band off of eBay for the bottle as I have a 580cc bottle and adaptor coming. I don’t like the looks of it as much as the cylinder but I only get 2 magazines through it before it gets close to regulator. I also prefer to have tank pressure on side and not on end of tube.
Here is my session of zeroing and then dialing it in. The band definately help as I was able to turn my elevation down. Power level 4 to get 870 FPS as it seemed to have the tightest grouping. Reg at 125. Hades 15.89g at 50 yards.