Took down the Pietta Remington tonight with them and didn't have a single problem...
And they will probably work just fine on newer guns that do not have their screws frozen into place. As long as you do not need to REALLY apply torque, you're likely good to go and will stay that way. A little grease in the threads will keeop your screws happy.
Most slipped or twisted drivers (buggering heads and slipping off to skitter across and scratch the crap out of a nice gun) are done while removing frozen screws. New guns like our modern replicas... probably not an issue.
Well done for finding an economical solution to your daily cleaning needs.