16 inch Rock River arms hbar barrel assembly. I swapped the original front sight post out some time ago with this JP enterprise adjustable fsp. I used this barrel assembly in conjunction with a A2 fixed carry handle receiver and it was a great setup. Everything but the front sight post had been painted at one point but most the paint has worn off of the barrel. The muzzle device is a Psr dual lock over the barrel flash hider from Griffin armament that works with their psr can. It's on the heavier side but both crazy. If you want to build a simple carry handle build with the adjustability for a suppressor or something it's a good start. Asking $150 obo. Text REDACTED if interested.