The carry handle is integral to the upper receiver.
Front sight is integral to the gas block.
National Match sights are standard. A muzzle brake is installed in place of a flash hider. Apart from a rough guard and extremely tight detent plunger for the winter trigger, fit and finish are as good or better than any other AR type that I have handled. Upper and lower receiver fit is not tight, but not sloppy. Upon initial disassembly and cleaning I found the carrier, bolt, pins and pivots were dry and required lubrication.