I created this gun to give my Generations Trailcutter his "laser hand" as a nod to the G1 incarnation. The peg is for 5mm hands but, this gun goes around the hand on the sides and in the front so it won't work for many 'bots if there's not enough clearance. I created the gun in 2 pieces so the barrel and the structure surrounding the barrel could be painted separately for crisp lines and good detail. The gun assembles easily; just slide the structure over the barrel and let the 4 legs slide into the corresponding holes in the hand guard. I have successfully tested this gun in WSF as seen in photos. Polished materials may work better, but you might lose some of the sharp edges and definition on the inlays. Don't want to paint it? I'd recommend trying the Black SF.