NEW 300 AAC BLACKOUT BARREL ASSEMBLY FOR THE SCAR 16S.  THIS BARREL IS ALL YOU NEED TO CONVERT YOUR SCAR 16S TO THE 300 AAC BLACKOUT CALIBER. COMES WITH LOWER RAIL AND HDD 3 POSITION HI-TORQUE GAS BLOCK FOR RELIABLE FUNCTION WITH NORMAL AMMO AND THE SUBSONIC AMMO, JUST SET THE GAS REGULATOR TO THE POSITION THAT SUITS THE AMMO YOU ARE USING. POSITION 1. SUBSONIC AMMO, 2. STANDARD AMMO, 3. OFF OR STEALTH POSITION FOR NO ACTION NOISE WITH SILENCER ATTACHED, ACTION CRACKS OPEN ABOUT 1/4" SO THE OPERATOR CAN RECHARGE EASILY AND QUIETLY.  MUZZLE THREADS ARE 5/8x24, HAS 1in7 TWIST ANS IS HARD MELONITE LINED FOR LONG LIFE. OPTIONAL FOLDING FRONT SIGHT FROM MAGPUL AND FLASH HIDER/QD SILENCER MOUNTS, SELECT IN BOX.