Bang for the buck you won’t find a better complete rifle on the market for a similar price.
5.56 vs .223. The difference is in the chamber and the “play” it has(term used just to avoid getting technical) If you have a rifle that shoots 5.56, it’ll shoot .223 without issue. Other way around and sometimes you can have a bomb on your hands.
.223 Wylde chamber on the other hand can shoot 5.56 in most cases. these chambers are a balance between a vigin tight .223 and a NYC hooker loose 5.56 chamber. They’re also found in custom/ precision barrels made to higher standards and stronger materials.