Posted on 22/02/201806/03/2018 by adminLEGO Marvel Super Heroes The Hulkbuster: Ultron Edition (76105) Officially Announced LEGO revealed The Hulkbuster: Ultron Edition (76105). The set has 1,363 pieces and retails for $119.99. It will be available starting on March 3 along with the rest of the Infinity War sets.