This is a new inner arm part and a custom 5mm Hand + 2 lasers for the Reveal the Shield Voyager Class Grapple figure. One laser is based on how it appeared in the G1 Cartoon and the Masterpiece Grapple figure, the other Laser is designed to look like the original "Missiles" that came with the G1 Grapple toy. All 3 parts attach to the arm interchangeably via a 5mm peg.
This is a kit for the figure's Left Arm, if you want the same kit for the right arm, that kit is located at the link below, keep in mind though the right arm version of the kit assumes you have an additional 3rd party attachment to re-locate the figure's crane piece to elsewhere on the figure.
Right Arm Kit: https://www.shapeways.com/product/9DZ4HQVW3/rts-grapple-right-arm-laser
Picture of the arms attached to the full figure provided by these parts' requester - Mdowns.