Palmetto State Armory M16 A4, 5.56mm cal. semi-auto rifle.   Serial #20002479.    Excellent condition Marine Corps. A4 clone Even down to the receiver markings.  20” barrel has excellent bore, 99% finish. KAC rear back up sight, KAC Ras rails with covers and grip. Black Cobra sling.  Rifle length gas system. A-2 solid butt stock. A very cool AR variant.