I'm unfortunately having to sell my upgraded Silverback SRS firing at 2.1 joules • Silverback DTSS .308 Silencer filled with foam • Silverback Advanced Piston Head with Airbrake • Super Macaron 70° Bucking • Rapax 2+ Joule Spring and spacers • 3 Steel Magazines with extended followers • Double SRS Mag Pouch • Stock pad...