Glock-A-Roo, thanks for making the effort.

I used to carry a genuine glass signal mirror, but always chafed at the weight, so I discarded it for lighter (and no doubt less effective) versions. (I'm down to a Coghlan's polycarbonate mirror which does double duty as a stiffener for my passport.)

I appreciate your point about being a one-arm bandit. I don't think I would be terribly accurate or effective with a bum wing and a basic mirror.

I need to look more closely at the non-glass versions with sighting capabilities. Again, probably less than ideal; but if you don't have it in your pocket when you need it, it might as well be on Mars.