IMHO any holster that could allow a ND is not a holster that I would wish to use. Under stress of a situation where one needs to deploy a handgun is going to be stressfull. The holster just needs to cover the trigger and the user should not need to operate anything to get there handgun in to use. Just KISS if retention is need due to job requirements then they are other manufactors that have holsters that do not present issues of NDing while deploying the handgun.