A gas blowback Tavor! That's what Project T of Hephaestus Airsoft is all about as shown by eHobby Asia in this video. We don't know what body they are using as two companies make the Tavor AEG, S&T and Ares Airsoft. The sneak peek shows it being fired in action and no information how far they are in the project.

If you like what you see, better tell your delight to Hephaestus at their Facebook page and tell them to produce it.