First off, I think you're confused on just what a "DAO trigger" actually is.

Double action only is a bastardized (and incorrect) term that has been so mis-used it has now become common lore.

What it originally was coined to represent was a semi-auto pistol that could only be fired by trigger cocking, like the double action stroke of a DA revolver. "Double action" means TWO; it can be fired by thumb cocking or trigger cocking. A DAO pistol can only be fired ONE way; via trigger cocking.

The HK LEM is sometimes incorrectly referred to as a DAO; it most certainly is not, but never let anyone be confused with the facts.

To answer your question, yes, a V3 (DA/SA) P30 can be converted to LEM. HK does not condone this, it will void your lifetime warranty, it will leave a sizeable open slot in the rear face of your slide; but yes, you can do it. In fact, I believe there is a tutorial on here somewhere that details the process, including the necessary part numbers.

Think about this carefully.

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What it originally was coined to represent was a semi-auto pistol that could only be fired by trigger cocking, like the double action stroke of a DA revolver. "Double action" means TWO; it can be fired by thumb cocking or trigger cocking. A DAO pistol can only be fired ONE way; via trigger cocking.

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I've always thought of double action is your trigger finger is doing two actions: pulling the hammer back and releasing it. Where single action your trigger finger is only doing one action: releasing the hammer.

Meh.

 

Yes, you can do it. Yes, there's a tutorial. Yes, I did it to mine and it runs just fine 1,000+ rounds later...

http://www.hkpro.com/forum/hk-refer...eference-library/169453-how-convert-v3-da-sa-p30-p30s-p30l-p30ls-v1-v2-lem.html