I bought this same lower for my cousin over a year ago and its a good lower overall. He never had any problems and PMAGs fit well with it.
It has a nice nice finish overall with no forged part lines (well the one that I bought didn't). The machining on the lower is noticeable but we didn't mind. I actually like the machine billet look compared to my other forged lowers
If I were in the market in buying another lower, I would consider Tactical Innovation as one of them.
I hope this helps