I looked at the ad. 499 after rebate. Probably a perfectly OK rifle at a good price.
If that is what fits his budget, no reason to not buy it. On the other hand, if he isn't just using home defense as an excuse to buy something that he wants anyway, perhaps he should consider alternative solutions.
If you shoot at a guy with a 556 and miss, how much stuff will the bullet go through?
Hey, they want free advice, that's what they get. That's what I've fixed in numerousJohnson /evinrude small outboards with the same issue, as long as I've been working on outboards. Not your issue, tough noogies. Wonderful. Take it to a mechanic and quit complainin'. I could care less.