Also featured within the lower receiver is the rifle's trigger assembly.

A modification to the lower receiver is required to ensure user safety.

Upper and lower receiver are made with aircraft-grade aluminum.

The manual ambidextrous safety is integrated into the lower receiver.

A weapon's stock is made of a polymer material and is attached to the lower receiver.

It saves weight by using polymer instead of the traditional steel or aluminum in the upper and lower receivers.

The stock and lower receiver are one piece.

The lower receiver detaches from the upper with two pins.

The lower receiver is a standard M-16 select fire unit.

The lower receiver and magazine housing are of sheet metal.