For total time:

15 front squats
30 toes-to-bars
15 thrusters
Then, rest 1 minute before continuing with:
15 front squats
30 chest-to-bar pull-ups
15 thrusters
Then, rest 1 minute before continuing with:
15 front squats 
30 bar muscle-ups
15 thrusters 

Workout 21.4 begins immediately upon completing or reaching the time cap for 21.3.

95 lb. for the front squats and thrusters

Time cap: 15 min.