Purchased this from another member here. Genuine HK417 12” assulatar barrel. Fluted chamber and chrome lined barrel with OTB extractor support. Barrel had some surface corrosion that you will notice and was removed and recoated to prevent any additional corrosion. Burke 5 position gas block. Included is a MR762 complete bcg. I have about 500 rounds through this and it functioned flawlessly and was more accurate than I am. $6500 shipped. Will separate out if desired.