AR-15 Complete Side Charging Upper has a 16" M4 Contour barrel with a stainless finish, and features a 1:8 Twist Rate, a Carbine length gas system. It includes a 12 5/16" MLOK Rail, an M4 flat-top billet upper receiver, a Bolt Carrier Group, a Flash Hider, and a right side Charging Handle(patent pending). It is chambered in 5.56 NATO.
