This addon package is compatible with all BUL Armory 1911 models (excluding the Ultra, Ultra Light, & Trophey Cesar).
 
BUL Armory R Package for 1911:
Modular trigger kit with 3 inserts
CNC machined steel grips
CNC magwell
Tool less guide rod
CNC machined spring loaded competition extractor
Power lightweight hammer
Power lightweight disconnector
Power lightweight sear