I hope this isn't a dumb question, BUTT, here goes. I recently bought a New Blackhawk. I took it apart to clean it before shooting it, and I could not remove the center pin. Is this normal? My vaquero pin comes out of the gun, as does my single-six, and old 3 screw. Don't know why I just noticed it, either. My recent purchase is a 41 mag, New BHK, 4 5/8, blue. As always, Thanks fer the advice!