Here is an interesting idea for video capturing firearm manipulation. Most people use a Contour on their earpro or a GoPro mounted on their headstrap.
Ilya Naishuller is crowdfunding his POV movie called Hardcore on Indiegogo. The clip stars Sharlto Copley, the actor in A-Team (movie), District 9, Elysium and the upcoming movie Chappie.
Charlto is sporting a PPSH and the protagonist is using a pump shotgun. But like a POV FPS game he picks up new weapons. It is rather intriguing and the POV is fantastic.
Ilya is using two GoPros mounted on a custom head rig. I suspect he is using two GoPros so that he can film and create 3D footage. Such a rig would make it difficult to cheek a long arm.
GoPro has their own setup for their original Hero and Hero2 cameras but have seem to done away with it as the demand is not that big for home made 3D movies. It requires a lot of post processing and to display it requires a 3D monitor or TV.
I went so far as to invert my GoPro so it covers my left eye and I get an almost true Point of View (POV) video. Here is an example of the POV I get with my method I dub #tacticalpirate because my GoPo is like a pirate eye patch.
Fellow TFB Writer, Chris Cheng, wrote a little article for NRA about compact action cameras.