I have a DPMS but not with the Bull barrel. Mine has a standard 20" Hbar.

It shoots under 1/2" with Winchester white box in 45gr hollow point. I can only imagine the Bull barrel would be just as accurate or more.

Jim-

I had one, that I sold a few years ago. It shot real well, especially considering the price. I sold it only because I had a couple bolt action 223's, and wanted to trim my AR-15 inventory down to just Service Rifle type stuff, so the heavy barrelled upper went. I still shoot the lower with a Service Rifle configured upper. If you have found a fair deal, I'd buy it.