There's an accessory for Glocks called the "Striker Control Device". It replaces the rear plate with one that pivots; the new one has a small dome that fits in the striker channel. You holster the same way you do with a hammer-fired gun, with your thumb on the rear plate rather than the hammer. With your thumb on the rear plate, the striker can't move to the rear if you snag the trigger on something. I wouldn't have bought the G45 I have if that hadn't been available.