I bought this 7.62 AR upper during the pandemic and never used it. I can’t recall what brand for sure and no markings on it or bolt, but 90 percent sure I got it from PSA cause I was buying a lot of guns and stuff from them then. This one is made to work on any AR-15 lower and they don’t make it anymore, only one that requires their proprietary lower, so these are super hard to find now.