The McCapsule digests into the front end of the "classic" battery tubes with no need for
modification. A modified McR-27 reflector completes the "drop in" set for converting a
"classic" series SF host into a LED light source. The Reflector threads in past the threads
in the head and then floats freely and captive. At any time, it can be removed from the
head and the light can go back to being a incandescent based light. Below is an example
showing a prototype McCapsule set up originally for a LongBow 1x123 application. Since it
is a BB converter and only good for 1x123, it is shown on a "mut" 6P.