There is another side to unintended discharges, that has nothing to do with weapon itself. I do play airsoft, and many on our team carry in real life, so one night we decided to do some training with our holsters, and airsoft version of guns we normally carry, at least as close as you could get, as well as clothes we normally wear. We did have an 1 unintended discharge and few calls calls, when a IWB gun was holstered, a shirt was caught in the holster, and upon putting gun back it pressed the trigger. There is also a video from a famous firearms instructor Massad Ayoob, who teaches when you holster a iwb weapon, you must bend like an arch, sticking your waist out, so if it does discharge, it does not hit your leg right where the artery is, like my buddy did, but misses your leg, or at least hit the front part of it where there are no major arteries, he was teaching that well before p320 came out.