AMERICAN RESISTANCE AR9, FOSTECH ECHO II BINARY TRIGGER, AMERICAN RESISTANCE PATENTED LAST ROUND HOLD OPEN LOWER RECEIVER, AMERICAN RESISTANCE 5.5″ NITRITE BARREL, 4.4″ MLOK HAND GUARD, KNS ANTI-ROTATION PINS, X-TECH PISTOL GRIP, SBA3 PISTOL BRACE.
AR9 FOSTECH TRIGGER
