The A.R.M. 4000 XL is a meduim ranged CPS. I think the A.R.M 4000 XL is an accidental CPS because the CPS chamber was actually put on the gun for the sake of looks. Ironic isn't it? Anyway the A.R.M. 4000 XL has a sucky output, but an incredible shot time, basically the opposite of the Argon. The A.R.M. 4000 XL comes with a 'hard to open and close' backpack that holds 25% more water than a camalback. The A.R.M 4000 XL was designed to be used with one arm, hence the 'A.R.M.' part of 'A.R.M. 4000 XL. A.R.M. also stands for 'Aquatic Revenge Machine'. The CPS Chamber inflates to a very very large size, I mean, it inflates faster and farther then a balloon. It also amazes me that the decrative CPS chamber is also of the best varity, cylindrical. But the CPS chamber was made for looks, not to make the gun better, and works like that in comparison to other CPS guns, but is still better than Air Pressure.
