For total time:

15 front squats
30 sit-ups
15 thrusters
Then, rest 1 minute before continuing with:
15 front squats
30 jumping pull-ups
15 thrusters
Then, rest 1 minute before continuing with:
15 front squats 
30 chin-over-bar pull-ups
15 thrusters 

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

35 lb. for the front squats and thrusters

Time cap: 15 min.