I do have a stripped lower laying around but it’s a PSA..does striped lower matter?
Only to people trying to prove a point. There are very few real arguments against cheap lowers. One valid one being proper alignment of pin holes which can make a nice trigger feel bad. If your going mil spec why worry. Some complain about shallow threads for the grip I've never ran into one that was shallow enough to be a problem. Resale is the only real detractor, if the builder went cheap on the reciever what else did they cheap out on mentality. Mostly it's an ego issue. There are some trick lowers with built in ambi features, but you get into the proprietary realm with those.