If there is no state law requiring the sale to go through a FFL, then what your friend is looking for is probably a bill of sale. OCDO member, legal guru and attorney par excellance User has a sample bill of sale at his website http://virginialegaldefense.com/Stuf...ransferBOS.PDF that he put there purposely for people to print out and use. One copy for your friend and one copy for you.
My additional recommendation is that signatures on both copies be in blue ink - that color cannot be easaily copied. Just an additiona; protection for both of you.
PS - Welcome to OCDO.