Well, you got a point - I am talking about welding real-life hands together with virtual guns.
Take this for example. A couple o'months, I told ya that I'll create new weaponz for you guys. The first one shall be the Prism rifle, it'll also be a weapon for Tristania3D 2, in Vibeke Stene's inventory.
Now then, the Prism rifle is hard-ripped, and the original owner was a male - with a male hand, which is not good, as the Prism rifle will need a female hand (at least for me). So, I ask my sweetheart to position her hands EXACTLY as seen in the hard rip, when the player handles the gun - she will agree about this, especially if I promise shopping in the mall to her
So anywayz, I record what she is doin' with her handz, and then, hard-rip her hand movements from the movie. After this, I simply "fotosopp" her hands into the Prism rifle's original hard rip. And there - a female handling the Prism rifle!
If you have a somewhat good video camera, or a digital camera, which is capable of recording somewhat good quality footages, you can easily "overwrite" the original owner's hands in the weapon handling frames and hard rips, and modify it to your heart's content (wearing rings, wearing gloves, not wearing gloves, bleeding hands, holding a bar of chocolate in your hand while reloading etc.)
So you don't need the actual weapon for this, but still, recording real-life footages, you could easily modify the hands on that weapon with ease. But that's just my opinion.