Daniel Defense 18" SPR barrel was a take off from their MK12 rifle along with the BCG. 


Geissele MK14 13" rail 


Surefire 3 prong Flash Hider


Aero upper receiver


Warne 30mm scope mount


Vortex Viper GenII 2.5-10x32mm MRAD 


BCM Charging Handle


Magpul MLOK AFG 


Aero gas block and tube


Willing to part out to a degree based on what you may be interested in.