Re-purposing the Trade Rifle. Ideas invited

[Matt W]

Or, "101 uses for a dead KFS Trade Rifle"

Speaking of volley guns, it occurs to me that there are other ways to make use of a worn-out Trade Rifle. After all, what we have is a mass-produced cast-iron tube. Just because it's now an inaccurate rifle doesn't mean it doesn't have other uses. If these tubes are cut down, welded or even curved we have a number of opportunities

Gas Pipes
Genuine historical trivia: Gas lighting was introduced in London in the 1820's, using pipelines made from war-surplus musket barrels.

Water Pipes
Do you want indoor running water, or a pump for a well? Again, cast iron pipes would be useful

Building
Would reinforced concrete be another low(ish) technology that might be helped by the addition of some cast iron bars?

Bicycle Frames (and the axles of bicycle wheels)

Axles in general

Components for stills

Any other ideas?