F Aero Precision M4E1-T RM10.3 Complete Upper, 5.56 x 45, 12.5inch, Government, Carbine, 1-7 Twist, 1/2 x 28 Thread, Cerakote, FDE, APAR700713M30 $589.99 APAR700713M30 show more like this Free Shipping on most orders over $49 Optics Planet