As far a modifications go, there's nothing that gets in the way of normal transformation. BLACKOUT, has a bunch of cool weapons that simply plug into his arms, shoulders, ect. He has two arm cannons (one features missle fire action, the other has a removable blast, and bullit strip). He also comes with a shoulder connon, with removable rocket flar, a removable blue LED search light, that has three modes (pulse, strobe, and normal. The light works on a push button, and can be left on (you don't have to hold the button in to make it stay lit. The search light also fits on his shoulder in robot mode. Black out comes with a detachable missle that fits on the tail in copter mode, tiney Scorponox (painted movie acurate), and a base that plugs into his underside either alone or with large Scorponox actached that allows him to be displayed in flying.