KNIGHTS ARMAMENT SR-15 16 UPPER NO FURTHER A MYSTERY

Notice:  This is a fresh upper receiver.  Charlies gets these as equally new in box and rake-offs from new rifles.  In 2023, most are not long ago removed from an entire rifle, as Knights has long been incredibly gradual to problem pieces.The first stage can be a ‘no-poundage’ phase exactly where hardly any resistance is felt throughout the