RA-Tech tests the EMG x RA-Tech SAI BLU RMR Kit installed on this video. This a full CNC'd kit comprised of the following: CNC Steel slide CNC Steel Outer Barrel, CNC Steel with barrel protector, CNC Steel rear & front sight set, CNC Aluminum trigger, Steel Trigger set, CNC Aluminum Nozzle Housing, and CNC steel RMR Cover Plate.