Who mentioned a B-gun?
With reference to front sights, I use a simple white bead. At a spring tournament, I'd gone to my hold point when a bug that looked just like my front sight landed on my rib. He then tried to make love with my front bead. Talk about distractions.
FYI: it was on a P-gun -- romantic those Italians.
This is going to get an "X" rating.