Just got mine today!
Entirely stock. I haven't receive my rs stock for it yet. I must say even though they're a bit tacticool they still look quite badass. I'll see what I can do with this stock until I receive the real one.
I'll be using the straight CO2 mag just for simplicity's sake. My sidearm is a wg revolver and those are co2. I'll let you know how these go once I receive one.