An interesting twist on exercise. Add guns!
If done safely and in the proper dosage I can see great advantage to a blend like this. Firearms accuracy and manipulation while under controlled, exercise induced fatigue could be an effective method of stress inoculation in advance of the “real thing”. I would tend towards looking for exercises that closely mimic actual combative motions vs kettlebell swings and push presses though. Sprints, burpees…perhaps some focus mitt/combative drills with a partner could mimic a foot chase, grappling and fighting with an opponent. Blend that with a safely designed and monitored firearms stage and you have some interesting possibilities.