Added by request. SLS laser printed nylon Aurora front assembly. We include the screws but you have to source the other parts. The Magpul 5 slot rail needs to be bonded and fastened to the top of the launcher, then bridged to the assembly using a 13 slot UTG 20 MOA Elevated Picatinny Mount, or other riser. This is the most solid method of attachment. It takes 3 magpul XTM hand stop kits to cover the side rails. The bottom front rail accommodates a Viridian C5L laser/tac light.