This will go on a NFA gun, so the flash hider does not need to be permanent. I am looking for a 14.5" barrel, and it must come complete with front sight, gas tube, barrel nut, etc. Handguards are an option, but I will also take a barrel with M4 handguards. Basically, I need the barrel with everything necessary to attach it to my upper. Barrel must be chrome lined and in good shape.