This King Arms M3 Tactical is a Personal Defense Weapon which was created for close combat situation. The cocking handle, magazine catch and fire selector were designed to be ambidextrous operated. It is equipped with two side mil-spec rails and top rail for mounting red dot sight or other aiming system. It has a built-in adjustable iron sight on the top rail and two fixed backup iron sights on both sides of the optional sight base.

It also has quick spring change system Ver.6 gearbox with 9mm bearing; a MOSFET assembly provides better trigger contact. The package comes with a 300 Rounds High-Cap Magazine.