My wifes partner is preparing for SHTF, getting food together, etc. She is in her early 60s and neither her nor her husband has ever fired or even handled a firearm. They want to know what they should get. In addition to advising them to get professional training, I was going to recommend: 20ga. Mossy and a Handgun (Glock 17 or a SW 686 .357 mag) I am in no way an expert and wanted input on good advice to give them so would a revolver be a better choice than a Glock for a Handgun for them? Any other firearm recommendations would be welcome.