I am a former gun owner and think assault weapons legislation based on pistol grips doesn't accomplish anything. Yes, why not base legislation on the power of

I am a former gun owner and think assault weapons legislation based on pistol grips doesn't accomplish anything. Yes, why not base legislation on the power of a weapon measured as, say, ft*lbs delivered in 20 seconds. A 50 round drum magazine on a Ruger 10/22 rifle - no problem. But on an AR-15 style rifle - not allowed.