The JE Machine Tech 1911 AR MIL-SPEC Pistol Grip does not come with grip panels or panel screws. So those will need to be purchased separately.
This grip adapter requires the grip screw bushings which are not included, and neither are the grip screws. This isn't stated on the package or any item description for this product that I've found but yes, it requires bushings and they're not included with the product.