Lightening the ram/piston?

[Laser-Fist]

I was specifically referring to the overall weight distribution throughout the length of the nitrogen filled gas ram. The "piston" of the completed ram appears to weight the same as the nitrogen filled body. When balanced on my finger "see-sawed", the balance point appears to be near the center, slightly biased to the body end. Do we discard the weight of the ram's moving piston? Sorry to bother you.

[Paul68]

In that regard, the balance of the ram really doesn't mean anything. The mass of the rod, in my opinion of course, could have a direct relationship to total piston momentum though. Since the rod is moving and the body is not, only the rod will have momentum. Momentum is a vector force, so only direction of rod movement matters, not balance of the rams parts.