First off, credit goes to A.C.E. for making the original one. He created it WAY before me. Also, this is only cosmetics, it WILL NOT cover anything for range
Materials
3B handle Nite Finder Epoxy Putty Hot glue
First, get your 3B handle and cut it here:
Put your 3B handle aside for a while and get your Nite Finder. Take out all of the internals and cut it here:
(You may want to sand away the curve left from the handle)
Now take your handle and hot glue it onto your Nite Finder shell (make sure that you can still open the gun up)
Now try your best to get it level by sanding. (You CAN'T cut off the NERF symbol, it won't work)
Now, to save Epoxy Putty, try to level it out with hot glue.
(I got it around the symbol)
Now, it's time to give your handle some strength and make more things level. Get your Epoxy Putty and glue down the handle and make everything smooth.
I don't have a picture of this, but the trigger won't actually work until you Dremel a hole in the handle fot it to slide through, but even after that it won't work! cut down your trigger to make it fit and them curve it with yout dremel (or create a new, smaller trigger).
Now, screw down the trigger and glue the trigger spring to the shell.
Put your internals in and it should look very strange.
Close the gun up and... your still not done. Fill those holes in the shell that let you see the plunger tube with hot glue
Paint it and your done!
Edit:
I have a video of it shooting that I will TRY to get up soon. Again, credit goes to A.C.E. for making the original.