Depends what you want it for, AR-15’s are great for the field because they are light but for true home defence somthing in a 308 like a FN-FAL is much more useful.
Personally if a firefight ever comes I want something that will shoot thru walls or crack an engine block at 600 yards. The .223 can never do this.
“I want something that will shoot thru walls or crack an engine block at 600 yards. The .223 can never do this.”
Neither can a 308, but myths are always fun to repeat.