The 11 speed road and MTB systems do not mix and match, as the cable pull amount due to the design of the derailleurs are different. The 11 speed MTB shifters will not work with 11 speed road derailleur, and vice versa. If you are looking for a flat bar shifter for 11 speed, we do offer two:
The rear SRAM S-700 11 speed shifter will work with the 11 speed road (and Force1/Rival1/Apex1) rear derailleurs. The S-700 shifters are sold in sets only.