Never had any problems with holster accidentally unsnapping, or my weapon falling out. I’ve had my holster 12 years +~. As far as carrying an extra pistol. I have no problem with that…as long as it’s the same caliber. Redundancy is always a good practice. Especially with survival, camping, or...
Great holster!! Used it for years. Comfortable on my hip or my back area. Easy to unsnap and drawing my weapon. I use it with my.45, my 9mm high power browning. You can’t go wrong with 1911 frame!