I knew I could get solid reviews here. Thanks.
Jr. will be getting an AR, and I’ll go with the Mini-14.
He’s camping out at Bragg now, (pun intended) and when he returns we’ll go shopping together.
I'm sure you'll enjoy the Mini. Unlike earlier versions, you can attach a pic rail type optics mount to the factory scope ring mount locations. Take a look at Ruger's video introducing the .300 AAC Blackout model for a good view of that part.
The UltiMAK "scout" rail can be mounted in place of the upper handguard, too - great for reflex type optics and such.