Upper Receiver Group Parts. Your rifle’s upper receiver group is the part that consists of the upper receiver, barrel, forend, bolt carrier group and charging handle, as well as other AR-15 upper receiver components. This device attaches to your rifle’s lower receiver to form your fully-functional weapon.Who makes AR 15 receivers?
Facing bankruptcy, the company sold the design to Colt’s Manufacturing Corporation who went on to provide a select fire version for the US Military designated as the M16, which eventually leads to creating the best Ar 15 lower receiver.What is an upper receiver?
The “upper receiver” is the half that the barrel attaches to and through which the “bolt carrier group” moves (the BCG includes the bolt, the bolt carrier, the firing pin, and a couple of pins that hold everything in place and govern movement).What is A2 barrel?
The “M16 A2″ style is an older configuration that basically means a full stock, fixed carry handle style upper receiver and a 20” barrel. It screams “basic training.”. The “A2” style also includes specific sights, barrel type and other features.