Manufactured in 1964. Three prong flash hider, post front sight on the gas block with bayonet lug, ventilated triangular handguard, standard markings on the lower receiver, A1 pattern upper without deflector or forward assist, correct later pattern un-serrated bolt carrier, adjustable two leaf rear peep sight on the handle, checkered grip, and fixed buttstock with a ribbed solid rubber buttplate. With extra magazine.