Cal: 556/223
Barrel: 10.5″ Chrome Vanadium 1:7 Twist
Hand Guard: M4 Quad Aluminum
BCG: Nitrided 556/223 Life Time Warranty
Charging Handle: Ambidextrous
Stock: Adjustable blade
Trigger: Mil Spec Aero Precision
Lower: Aero Precision CS M4E1 Pistol Lower Receiver
Upper: Billet CS T Marked stress relieved M4
Sights: A2 FSB front and rear manual
Mag: 40 round

Ships as an upper and a lower to your FFL