I just finished the book "GLOCK" and just bought a Ruger LCP which makes me wonder about there light and short trigger pulls. Between their shorter, lighter trigger pulls compared to revolvers it seems that the Glock and Ruger LCP's firing pin springs might actually be cocked prior to the trigger being pulled, and that their triggers are just designed with a longer and heavier pull than would be normal for a gun with a single action pull. If not, it amazes me that it takes so little energy to set off a primer in pistol ammunition. I've had primers fail to ignite in rifles and it seemed the firing pin spring would have had lots of energy to get the job done. If the Glock and LCP triggers actually do supply all the energy to the firing pin spring, why do revolvers' DA triggers require so much more energy?

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why do revolvers' DA triggers require so much more energy?

Because you are useing the energy not only to set the primer off but to rotate the clyinder,cock the hammer those actions all take energy

Glock and a few other striker fired pistols have the spring partially compressed by the slide movement. The trigger pull then finishes the job. This puts them somewhere between a true DA and SA.

Ruger has redesigned the trigger on the LCR, which is DAO, and it is truly amazing. Don't know about the LCP.
Peter.