Sig 556

Marui Sig 552
GWS Sig 556 kit
SigSauer Grip-Light (RS)
SigSauer rear sight (RS)

Prometheus 430 x 6.03 inner barrel

Phoenix Speed gears
Prometheus metal bushings
Systema cylinder
Systema Silenced Cylinder head
Systema Silenced Piston head
Madbull reinforced piston
Madbull M100 spring
Guarder Hop-up bucking
Prometheus tappet plate
Prometheus anti-reversal