They're pronated grip pull-ups (hands forward), with a thumbless grip. So designed for those folks who find themsevles pulling themselves up on window ledges and rooftops (Think Law Enforcment and Military).
things like tactical pull ups,boot camp class work outs are fake.they take something regular and make it sound flashy or "hard" i use hard like a 0311 would use hard.working as a fire team or squad going over walls or into windows is team work not what grip you train on pullups. a thumbless grip pull up is just a thumbless grip pullup.
Actually climbing walls and windows instead. The funny thing is, the thumb can be used most if not all of the time in a "real" scenario. I often find my thumbs would dig underneath the window sill or into the wall when I'm out running and looking for something new to do pullups on.