IIRC, the trigger and trigger bar are sold as a unit. I think they were designed to be installed and replaced that way due to the way they are assembled (blind pinning), and I do not remember ever seeing one offered for sale as a part without the other being attached/included.
I have personally replaced many of my smaller Glocks' grooved trigger assemblies with smooth trigger assemblies, and they were always replaced as a single unit.
“It is foolish and wrong to mourn the men who died. Rather, we should thank God that such men lived.” -- George S. Patton
Last edited by DJ Niner; 05-07-2012 at 00:22..