This is a very simple edit that makes Raul's .44 revolver a uniqe revolver available only to him. I never felt his .44 really fell in line with his "old school ghoul" image. This mod is only an .esp. The meshes and textures required for this mod to function are found in SpamPTRS's "Colt single action army" mod, found here.
http://www.nexusmods.com/newvegas/mods/50931/?tab=2&navtag=http%3A%2F%2Fwww.nexusmods.com%2Fnewvegas%2Fajax%2Fmodfiles%2F%3Fid%3D50931&pUp=1