Upon looking at the MRC videotape frame by frame, with the first rifle you could see a puff of smoke coming out of the end of the barrel as the deputy fired. But with the second gun, you could not see anything, as if no bullet were being fired.
So what this looks like is that the second rifle probably had blanks. I think this is a SCANDAL as big as NBC purposely blowing up GM pickup truck gas tanks to show how "dangerous" they were. A determination MUST be made to find out if CNN committed fraud by using blanks.