Original Imperial German WWI Model 1916 Inert Training Stick Grenade - Übung Stielhandgranate Napoleonic and this is the marking

and this is the marking seem on M91 rifle barrels produced during 1940 - 1944

commended Greene for his "skill and judgment" in this defense

and members would wear these triangles on their sleeve

We see this with some of the Army daggers

Original Imperial German WWI Model 1916 Inert Training Stick Grenade - Übung Stielhandgranate Napoleonic and this is the markingOriginal Item: Only One Available. This is an extremely rare excellent example of a practice training M1916, M16, or Stielhandgranate 16 ("stalk stick hand grenade") German Stick Grenade, often called a "potato masher". They are officially called the bung Stielhandgranate, which literally means Exercise Stick Hand Grenade. This grenade is completely inert as specified by the BATF, and cannot be converted to an explosive device. It stands 14 inches