Franklin Armory Triumvir Flash Hider SBN 1/2in-36 6.5 Grendal 6.8SPCII 300-BLK 7.62x39 Black 00-52310-BLK. 56 NATO 6.8 SPC II 9mm SIG MPX and 7.62 NATO. The Triumvir muzzle device is a strategic combination of design features to better equip users of...