Oh, my. "Meet the face of (Colorado's) pro-gun recall campaigns"

[Travis_0004]

12. you are a bit off on the metal slanting thing

Its not designed to reduce recoil. Its actually a piston. When you fire a gun, a bunch of gas goes out the barrel. Some of it goes up where the metal slanting thing is, and pushes against a piston. That piston then pushes the old shell back, where it is ejected, and loads a new round. Its something that every semi auto rifle has to do in one way or another.

The AR-15 is similar. There is a hole where the font sight triangle is, and it goes up there, and into a long tube that feeds the air back into the gun, to load another round. Its just not as obvious on an AR, because it looks like (and acts as) a front sight)