Silverback HTI

Hello, Im looking to sell my Silverback HTI. It has EDGI piston, custom aluminium piston head with O-ring and mousefart. Custom spring guide to reduce spring noise. Second carbon fiber outer barrel with 16mm cw thread. Maple leaf whisper suppressor, custom amolifier for original barrel. Maxx hop up unit, spare fast hop unit. Some addtional spare parts. 125n, 110n springs. 2+1 mags, DTSM scope mount. Scope itself and bipod are not for sale. Im opet to swap it for VFC MK20 gbbr