I just used the krylon/rustoleum camo spray paint.  It has a dull finish and is fairly durable.  I put a few coats of matte clear coat on top to help seal it.  This is the third gun I have painted this way.  You would think I would have it all figured out by now but I know we could have done a little better job on it.  My 835 that we painted about 5-6 years ago looks a little better.  The good news is that we can re-do it in about an hour if we are so inclined.