Base gun is an A&K Mainly looking for tr^des Vfc avolon trigger New trigger contacts Shs gears Lonex anti reversal latch Lonex bearing spring guide Shimmed Lubed Polished AA piston and piston head (steel teeth) Prowin hopup (flat hopped) Valken alloy 6.03 inner barrel Low res wires Lipo ready, around 16-18 bbs a second Around 400 FPS with .25