The Jard J180 is an American-made upper&lower kit for making an AR180-style rifle. Unlike many 180’s, this one uses direct impingement, just like the AR15. Why does this matter? Because it makes it easy to replace barrels with AR-compatible barrels. Most other 180’s require you to use a specific gas tube length: most are carbine length, and that limits your barrel selection. The J180 also has a very interesting takedown. Is it better than the more popular WK180C or WS-MCRs?