Overall weight of the upper receiver is reduced by use of a government profile barrel. In this case, the Daniel Defense LITE rail is installed which prevents me from showing the full barrel profile.



Government Barrel Profiles
Duty rifles are built to be carried - day in and day out. The USGI barrel profiles (often referred to as the Government Profile) enable the operator to carry their weapon for longer periods of time and deploy them faster than the heavier commercial H-Barrel counterparts. The government profile barrel is also compatible with the current M203 mounting systems.