Selling my VFC HK416C upgraded everything works perfect(come with two PTS age mags and battery box) It's full upgraded 1. Prometheus inner barrel 2. Upgraded piston 3. Upgraded high speed motor 4. Upgraded gear box 5. Prometheus Gear set 6.new hop-up bucking 7. Prometheus non-liner spring 8. Upgraded tune-up kits ......（no trade）（price drop）