Les Baer, FBI-HRT...
Baer is highly rated & provided the DoJ FBI contract for a few high-cap custom model 1911a1 pistols for regional SWAT & HRT(Hostage Rescue Team) members in the late 1980s/1990s.
Les Baer's shop couldn't keep up with the strict contract demands for the FBI & they later switched to the regular 8rd type S-A .45acp models.
To my limited knowledge, The HRT & SWAT qualified FBI special agents still use Springfield Armory sidearms.
I do all my own stunts.