My step dad and I have been talking about going half on a 223 and I am talking with some one right now selling an Anderson vs24 with aeroprecision lower. I'm having a hard time finding info on it. Seems like it's a 24inch bbl and a 1-8.5 twist (or 1:8??). Any one have experience with this upper? I know less then nothing of ARs. I'd use handloads and use strictly for target shooting at various distance within reason. I decided to look for 223 mostly because of cost and I'd like to own a gun chambered in my old military m16 and m4 chambering. I wasn't thinking AR platform but its a deal. Current owner says it can put 10 rounds into a penny size group at 100 yards and have less then 20 rounds total fired through bbl. I'm curious if these have a reputation or if the resale value is decent with them. I also am curious if you can rebarrel an "upper" or if you have to buy a new upper. I don't have much time to research this right now and hoping to make a decision on it this week.