concerning the decision regarding the cal tek. can you explain to the jury your understanding of double action vs. single action guns? >> of course. a firearm that has double action requires the trigger in the hammer to do two separate things, two separate motions. one is as you are squeezing the trigger, the hammer was in front. was forward it has to come back. that's the one action. then it comes forward and it fires the firing pin, which sets off the firearm. single action would mean the firearm, the hammer mechanism is back and one, as you squeeze the trigger, it does one action, which is single. now, there are some automatic handguns that are single action or i'm sorry double action only to where internally the hammer is internal, so you really can't see the hammer coming back. but both functions are back in a double action capacity with