Dont buy this bcg - Radical Firearms RF 223/5.56/300AAC/22Nosler M16 BCG, Melonite Bolt Carrier Group (BCG)

Bought this BCG. It wouldn’t fit into the upper. I contacted RF to let them know the BCG is out of spec and they may have several. RF said to send it to them and he would exchange it. After 5 days I emailed them and they emailed back saying they could not exchange it because the inventory manager was on vacation. Received an email stating they could not exchange it since I bought it from Dvor that I would have to deal with them but they offered to sell me one. Are you kidding me? Save your self the trouble and avoid RF BCGs.