I've probably bought about 10 bolts over time and would continue buying from them. They have the most affordable quality bolts around, backed back excellent customer service.
What more can I say about this bolt? It's sleek, full delrin, comes with xrings(double the seal) and is just a drop in replacement! This bolt is excellent when you are upgrading to Low Pressure because the bolt is very high flowing(increases about 20fps) and reduces friction, therefore you can cycle faster.
I would recommend this bolt to anybody who is looking for a reliable, affordable, and quality delrin bolt.