For its transformation mechanism, I built it more similar to Megatron rather than Shockwave; both Transformers used their gun handles as legs, only Shockwave formed his arms to make the barrel, whilst Megatron's arms formed the stock, and his barrel was a separate attachment (which became his fusion cannon in robot mode). Henceforth, when Plasmashock transforms into robot mode, the orange Zapper barrel becomes his side gun!
Some original Transformers (notably Starscream/Skywarp/Thundercracker) would only transform as toys by removing/adding multiple pieces, such as fists and landing gear, whilst others could easily switch back and forth by folding joints. Plasmashock does both; to go from gun to robot, his trigger becomes removed and attached to his head to make face decorations, and the barrel of course separates to make the side gun. Otherwise, the legs fold from the gun handle, the arms are made from the stock, the head rotates and rests inside the chest.
-Baron von Brunk
P.S. - Currently I'm developing a transforming GameBoy that greatly resembles Soundwave, and even includes a miniature transforming Tetris cartridge as a robot companion! Stay tuned, loyal Brunkamaniacs.