I have a king arms PDW, upgrades include: Gate Aster $90 Gate quantum trigger $20 SHS 13:1 gears $25 SHS metal tooth piston, piston head, cylinder head, o-ring nozzle ($40) Upgraded motor (can’t remember it’s either a G&P m140 ultra custom, or a Big Dragon M160 (both at OEM of Chihai (spelled that wrong) but they are great snappy motors. Can’t remember the name (bio-frost?) flash hider/amplifier. It came off my Strike industries gun. It is loud and mean sounding. Last chronograph was 340fps with .20 so perfect CQB gun, very snappy and fun to shoot. Wired to deans, comes with 1 MAG midcap