It all comes down to the amount of force required to rotate the sear. It takes specific amount of force to do that. If you want to reduce the amount of force required, you require greater leverage and therefore need to increase the length of the lever. By the same law, if you decrease the distance required, you increase the force required to push the lever. It comes down to simple science. Work = force x distance.
Originally Posted by flampaint
When you add in the operation of an autoresponse trigger system, you not only need to have enough force to rotate the sear, but you also need to store enough energy in the spring to rotate the sear when you release the trigger. Therefore, at a bare minimum, you need at least 2x the trigger pull force for the same distance travelled. To alleviate some of the extra force required, the autoresponse trigger system has made a longer trigger pull.
If you want to reduce the trigger pull distance or force, then you need to reduce the force requirement of the valve to be fired.
Except for the Automag in front, its usually the man behind the equipment that counts.