Great upper - TRYBE Defense AR-15 16in 7.62x39mm M-LOK Complete Upper Receiver

I would give the finish an 8 out of 10 still very good. The functionality was flawless, I put it on a spikes lower and never had an issue. Fired consistently, ejected properly and no feed issues right out of the box. It's worth knowing it does have the enhanced firing pin already installed. I was shooting mainly brass (about 100 rounds so far) but also fired some wolf steel case and had no issue. I actually took a "no fire" wolf round that failed to fire from an ar with a standard firing pin and loaded it in this one and it fired no issue. Would definitely purchase again.