The 16” Dissipator barrel is designed to mount rifle length A-2 hand guards, which gives you a greater range of control over your CAR length rifle. It also has the added benefit of having a full site radius, which means a greater level of accuracy! It’s mounted on an aircraft quality aluminum Mil-Spec upper. Includes Bolt, Bolt Carrier, charging handle and comes with your choice of A-2 Buttstock or DS-4 stock, and your choice of A-2 or Flat-top upper. We use a standard 16" barrel and gas system and use a low profile gas block to improve reliability and functionality, not like some others that use a 20" barrel and gas system.