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The AR-45 Lower Receiver in 80% completed form. The AR-45 is precision CNC-machined from solid aerospace billet aluminum. It is not a cheap forging. This is a top-tier AR-45 lower receiver perfect for any high quality AR-45build. Some of the features we include are last round hold open, ambidextrous bolt release. WILL NOT SHIP to the following areas: California, Colorado, Connecticut, District of Columbia, Hawaii, Illinois, Maryland, Massachusetts, New Jersey, Delaware, New York, Rhode Island, Washington and Philadelphia, PA. – Our products are not sold or shipped to residents of New Jersey