There are a lot of people buying Vulcan AR lower receivers over at calguns.net. They feel safe buying the lowers since the lower in the AR system does not do much. As long as it is in spec the lower should work. There are varying degrees of happiness with these receivers however, and more than a few people that have receivers that are out of spec. Very few of them have ever considered buying a complete firearm from Vulcan. One of the sad things about Vulcan is that they have a tremendously diverse product line that would be great if they only produced a quality product. What other company produces clones of an AR, AK, MAC-10, Galil, MP5, AR-180, and a .50 rifle? In addition to producing FAL and AR-10 receivers. If only these products were well made it would be a great company, but alas they are usually just malformed paperweights.