M4 RIS Used surplus RAIL (NICS/DINGS/SCRATCHES/DIRT/GRIME)
-Maybe missing bottom heat shield; do not complain – some guy was in the desert running one without the shield
-Three options; with locking screw, missing locking screw, missing locking screw and RAS bottom (rail can still be used without locking screw; just would not rely on a laser staying 100% zero’d

