This is a new in box Franklin Armory BFSIII M4 5.56 rifle. The Franklin BFSIII Binary Trigger is already installed from the factory. It has a 16" LTW barrel (1:7, 1/2x28), flash hider, mid-length gas system, 15" M-LOK hand guard, 6 position stock, 1 - 30 rd mag. Forged aluminum upper and lower.