AR9 FOSTECH TRIGGER

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.