I carried an Ontario Spax head down in the hydration bladder pocket of my backpack. Worked fine. Handle stuck up just enough to pull it straight up and out. And yes, I agree, a small hand ax or hawk gets their attention. Got out of the vehicle in Najaf very early in the war and was surrounded by hundreds of the buggers. They were just curious back then. The Spax moved 'em back far enough for a civilized conversation.
Things have gone downhill since those times.