[RightGeek]

Since he threw it in his backpack, it isn't the tube, just the rocket.

[Calvin Locke]

From the photo in article, it looks like the head part of a panzerfaust projectile. It contained neither charge or fuse.

Some times, the "authorities" over react. A year or two ago, somebody fished out a PIAT launcher out of a river, and they treated it like an explosive.

It launched it's projectile via a spring. I suppose if the spring was compressed, and something was weakened by rust, it could do some damage.

[Trod Upon]

Those look more like rifle grenades.