The Birdsley is a bird headed Bisley frame for use with a Bisley Hammer and trigger, the front strap is straighter down than a regular birds
head Like the Bisley . However the back has a nice curved rear strap. It allows for use with larger hands because the backstrap goes all the
way to the hammer. It is available with a standard Bisley outer and a curved birds head inner cut so that if you want the extra weight for a
big Boomer or so decide at a later date, you can cut the back down as you wish.
I have a 500 Maximum with the BisBird combo just because i wanted the extra weight!
It is also available with a Standard Black Hawk trigger Guard for use with the Black Hawk trigger only!