PSA 10.5 chromelined fn barrel with giesslele mk14 rail . Pinned gas block with iron sights and surefire war comp installed. I have shot 3000-4000 rounds through this upper . It runs 100% reliable. The reason I am getting rid of it. I switched to a 9.2 inch Upper to save some length with a suppressor and some weight out front . I dont need this upper any more . The barrel has plenty of life left still. No bcg or charging handle.