Ever since the Las Vegas shooting and Senator Diane Feinstein introduced her bill to ban bump fire stocks, claims have been made about the speed at which semi-automatic rifles can be made to fire while using these ATF-approved accessories. Defenders pointed out that in order to simulate full-auto fire, you don’t need a bump fire stock . . You can achieve the same rates of fire with a rubber band. Or a belt loop as seen on Youtube channels. But what many really wanted to see was someone with serious skills to fire an un-aided semi-auto AR to see what...