Here we will be discussing all these two options that you can have in the assault rifle category. It can all be relative to your usage and experience.
AR-15 Vs. AK-47: Which is the Best Rifle for the Apocalypse?
The AR-15 vs AK-47 - Crate Club, LLC
What AR-15 brand would you take to SHTF or war? - Quora
AR15 vs. AK47, The Great Semi-Automatic Rifle Debate
AK15 Rifle MM47 762X39
The Great Debate AK47 vs AR15
LLP #82: AR-15 vs AK-47
Which Is The Right Choice?: AR-15 vs. AK-47
Chris Sambola Fan Club
AK-47 vs AR-15 Part 3, by Nutnfancy