I bought a used 4006 with a very short trigger reset. How short? First trip to the range, I did an unintentional double tap (surprisingly accurate). I didn't really want to have another one of those extra surprise discharges again so I spent some time learning the trigger. Tho that never happened again, I didn't carry that gun or use it in competition. After arthritis made shooting that gun uncomfortable, I gave it to a very worthy nephew.