Not a silhouette question, but I don't know where to ask.
I'm trying to make my old browning b-80 12 guage semi-auto into a more useful gun. Does anyone know where or who makes an extended magazine that will fit this gun?

I would try choat...they make extended mag tube and other accesories might have what you want there.

You could try asking at the Tactical/HD forum on www.shotgunworld.com .