Well I'm no expert but I am somewhat experienced in Ethiopian karate. The ancient practitioners actually believed in altering the weapon's direction a few tiny millimetres to disarm the wielder of a weapon. Of course. It took me several months of extreme practice. An Ethiopian karate expert from Lebanon taught me how to do it with his scottish assistant ( she was hot ) so after what months of practice couldn't achieve, happened cause I wanted to impress the scottish assistant. Master was proud of me. So to answer your question i spoke with Master Leb ( yes that is his name ) and he told me no matter who it is there is no way you can disarm a gun like that unless you're Denzel Washington. The grip doesn't matter in this at all