Questions about Firebird lower

So I was out looking at parts today to add to my collection for my first build and I came across these firebird lowers at SGC. Seemed like a pretty good price at $119 so I picked one up. Now I’ve been looking around online and I really can’t seem to find any real facts or info on these lowers.

The quality seems pretty good I’m pretty happy with the purchase myself. I guess I’m just asking if anybody has any experience with these or knows something about them to share some with me. Thanks in advance, and sorry I tried search but it kept giving me some error message.

I got one awhile ago, the forgings arent as clean as some, about on par with Spikes. I personally prefer Mega over them any day.

Alright thanks. Yeah I did notice a few flakes of extra material around some of the holes. I’m not to worried though I’ll clen them up a bit before I put it together. Anyone else have any thoughts on these?