Moriarti OpticsPlanet Exclusive Pistol Upper Receiver AR-9mm 4.5inStraight 1-10 Twist 1/2x36 4in Diamond Cut MLOK Slim Profile Black MAR-9MM-4-7-SLICK. 5in Slick Slider Pistol Upper Assembly. These AR15 Upper Receivers through the professional...
Moriarti OpticsPlanet Exclusive Pistol Upper Receiver AR-9mm 4.5inStraight 1-10 Twist 1/2x36 4in Diamond Cut MLOK Slim Profile Black MAR-9MM-4-7-SLICK. 5in Slick Slider Pistol Upper Assembly. These AR15 Upper Receivers through the professional...