More information as posted by our partner, Public Enemy on GFthe WE Airsoft MSK Gas Blowback Rifle with this video showing it being tested somewhere and fired in single shot and full auto modes. And from TAF Custom, they also announce a custom CQB WE MSK-E Gas Blowback which is available in Black and FDE colours.

TAF Custom are offering this for NT$7,990, which is roughly US$269.00 using foreign exchange rates as of this writing with a September 10 shipping date.  Better contact them if they are selling this to overseas buyers.