The Tavor 21 AEG from S&T Armament gets an upgrade and given an electric blowback feature. Designed to be a "professional" version, this AEG still has all the materials and build of the previous S&t T21 AEG, and this one can fire at up to 390fps. The video below shows the blowback in action though we like blowback, we prefer them if the can come with recoil.

You can check this AEG at the Smart Team HK website.