In a car like a Subaru... Im skeptical. I have a truck and cant find a place for that which is out of sight.
But my large Vaultek slips under the seat secured by the cable, just pull it out when needed and no one is walking by. Tip: get one big enough to leave the gun in the holster. This is safer for "administrative duties" like arming/disarming. Belt clips instead of belt loops are ideal on the holster for this. Just slip the holster on/off.