Their BCGs are great. They’re the rate limiting factor to full builds so they don’t advertise them for sale on the site. This is my understanding from conversations with a rep that’s been there a long time. That being said if you contact them, I usually call, they may sell you one. Some barrel manufacturers, like Proof, recommend JP HP bolts because of quality and guaranteed correct headspace to their barrel so keep that in mind. You can pick any quality carrier for it. I like Fail Zeros coating so I use those.