I have extensive experience with a lot of firearms but not much with the AR. Through work I get a lot of great manufacturer discounts and I can buy some great brands for what it would cost me to build one and that's the only reason I haven't built one. However, I think building one would make me more knowledgeable on the AR platform. From my observations at work, I'm not a fan of carbon lowers because they seem to be the most problematic at our store. I recently had a very knowledgeable customer show me one he built on a $99 Plum Crazy lower that he combined with a DPMS Oracle upper. Upon further examination, I was impressed with the lower. He owns some very expensive rifles but claims this is out shooting all of his others. He's only put 500 rounds through it. So I'd like to hear from some experienced AR guys. Is this a worthwhile project or would I ultimately be happier to stick with steel and just buy one and be done with it? Or will this become like that 1911 thing where I do both and end up collecting several?