I helped test the RamRod and wrote an article on it for Paintball 2 Extremes a long time ago. THe way to quiet them down is to make a small open ended sleeve out of paint absorbent material to slide over the top.
Makes it VERY quiet - sew a little elastic into both ends - and viola - quiet ram rod.
Doesn't stop it from weighing 800 pounds though.
The theory was to sell these to field owners so that they didn't have to worry about cleaning barrels or issuing squeegies...