Sven
Senior Member
I just learned that the little plastic thingy I occasionally see attached to some competitive shooters' glasses at the range is called a "Merrit Disk" (sp?).
Could someone fill me in on the history and workings of this device? Only for 'old timers'? What gives?
Could someone fill me in on the history and workings of this device? Only for 'old timers'? What gives?