donn_
Flashaholic
It's taken over 2 years, but I finally have a threesome of PR heads on round body tubes; UBH, E2 and E1.
PR is a shorthand for McLuxI PR head. It was one of the first McGizmo productions. PR stands for Pelican Reflector, after the 27mm reflector used in the head. It's a superb E-Series Surefire and Aleph compatible mini-turbohead, with a variety of built-in LED light engines.
Read about it here.