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A Brief History of the AR 15 The AR-15 semi-automatic rifle has an unmemorable history. It was designed in 1956 by Armalite. In 1959, the patent to the AR-15 was sold to Colt. It was marketed to civilians as the counterpart to the military fully automatic M4 rifle. 1977, the patent was allowed to expire, and the AR platform became open-source. This means various companies began to offer and construct AR-15-style rifles. Today, the AR platform has become one of the world's most recogn …

Every year we sell thousands of AR 15 lower parts kits. With many of them as part of AR 15 lower build kits. We thought that we should share our bestselling AR 15 lower build kits and explain why they are so popular.For those who like building every aspect of their AR, the lower build kit is the best way to get all of the necessary parts to complete the stripped lower receiver they purchased from their dealer with an FFL. What's in a lower build kit?Everything you need to complete the assembly o …