It all depends on what you want. If you are looking for particular brands and types of products, then building is better. You get what you want to start with. Personally, I plan my builds carefully and shop wisely taking advantage of sales. It may take me a few to several months to get everything I want in order to save money on good quality parts. I also have taken advantage of the classified section on another forum to find slightly used parts at a huge savings over buying them new. Also, if you have any mechanical ability, building is a good way to learn how the ARs are assembled and how things work together. If you can find an AR that is set up exactly the way you want it without having to change anything, then it may be best to buy. It is all up to you as to what YOU want. Me, I prefer to build because I can tailor it to suit my needs for the build. After 11 years of building and over 3 dozen builds later, I have learned a lot.I have looked at a Daniel Defense M4 V11 pro 5.56 and it seems to me to build a 5.56 AR it cost about the same. Unless you wait for sales and you are patient. Anyhow any advice on building or buying? Thank you.