- Armscor/Rock Island
- Auto-Ordnance
- Les Baer
- Ed Brown
- Cabot Guns
- Charles Daly
- Colt
- Firestorm/MetroArms
- Kimber
- Nighthawk Custom
- Norinco
- Para USA
- Randall
- Rock River Arms
- Ruger
- Sig Sauer
- Smith & Wesson
- Springfield
- STI
- Taurus
- Volkmann Precision
- Dan Wesson
- Wilson Combat
- Custom Pistols
- Other commercially-available M1911s
- More than one of the above (questions pertaining to more than one brands)
- Rimfire Corner