The ciener adaptor in a 223 at best is tin can accuracy. Thats OK if thats what you want to do and nothing wrong with that at all. If you any better accuracy, you need a dedicated upper with a smallbore target barrel on it and the accuracy will be good for target work. But for casual plinking the Ciener in a 223 is OK. I even saw on You Tube or some site that someone made his Ciener in a 223, fully automatic. Shot an entire clip all at once and it was fun to watch.Bottom line is for plain fun, the Ciener is OK but for target shooting practice the dedicated upper is the way to go. Welcome to Accuracy Speaks or CLE in Fl sells them...about $1100 area. Keep in mind these are some of best dedicated uppers for 22 rimfire. Lower priced dedicated units may jam up. These units are A LOT of fun to shoot and 22 rimfire is much lower priced than 223 ammo.