As to durability-the materials the Packrifle is made from are machined alumium and carbon fiber tubing. Those are basically the same materials used in trekking poles that last thousands of miles being pushed against the ground with ones full body weight or twisted between rocks ,logs whatever .. The Pack rifle's slso probably much stromger than the structural poles used in modern high end ultralight tents that can hold up to gale force winds.
As to noise- some of the report of a revolver comes from the cylinder gap..So even if you had a custom barreled 22 revolver with
the same length barrel as a fixed breech rifle- the revolver would still be louder.
