quick ? on battery pack O-ring

[FreakBaller12]

can i use any oring cuz it acts like a a spacer? can i use an o-ring for my ntiro tank?
is there a specific kind

[IcantBelieveit]

just as long as it is thick enought to hold the battery Up in the case as far as it will go so rhte terminals make good connection with the contacts on the gun. soo in shory yea a tank o-ring would be fine