Added by request. SLS laser printed nylon Carbine front assembly. We include the front bottom screw 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. Our Carbine model uses 2 Magpul XTM rail covers the on the side rails, and a Fab Defense FGGS-K Folding Fore Grip.