Selling my LMT 5.56 NATO carbine upper. Twist is 1/7. Bore is clean and shiny. I've put about 300 flawless rounds through this upper. Does not include bolt carrier group. Pm with any questions. After some queries I should state that this upper was purchased at the Portland Gun Show approximately four years ago where I was told that it was a factory-assembled upper. However, I am uncertain how to ascertain whether it was or wasn't so I can't guarantee where it was put together. I don't know if LMT sells standalone upper receivers without the barrel, though (someone feel free to set me straight on this if I'm mistaken). I put the handguard on myself, so that part was not factory assembled, this much I know. what I do know is that it has functioned perfectly in the time I have had it. The bullets go where you point them. I also forgot to state that this has a KNS crosshair front sight post. I don't think I still have the original post but I can check. Thanks for looking!