I received my complete Davidson Defense Arian, AR-15,5.56 upper receiver in unusable condition. The slots for the charging handle were cut wrong and won't fit in. The dust cover won't close as well. I finally received the AR upper after 3 weeks of waiting. I've tried numerous times by phone and help tickets with no response. It seems once they have your money it's over. I won't be purchasing any more items from this company.