Great bolt carrier - JP Enterprises Stainless Full Mass Tactical Carrier

I got this because I had a JP bolt. I got the JP bolt because it's the only bolt that Krieger Barrels will head-space their barrels to. Based on what I've seen so far, I see why. The carrier is cut differently than a stock carrier. The carrier won't let the dust cover close unless the carrier is retracted (locked back) or fully in battery. It's got way more contact area than a standard bolt carrier. The JP bolt rides in there really smoothly.