This is a M60 barrel that will need some work to be finished. These barrels came off the production line of a government contractor. Barrels are in various stages of assembly and disassembly. You will need to install the barrel extension and check and adjust headspace. Gas port holes may need drilling. Gas cylinders and front sights will need to be installed. Picture shows all the parts included. Some barrels may have some parts installed. The parts may have been installed wrong and need rework. We believe the barrels are all repairable. We consider this an advanced project so no returns.