Fast action - Push the cocked hammer forward and it will lay down but the mainspring will remain compressed. Gun will fire with a long but light pull, often lighter in pounds than the SA.
This isn't the case. The first part of the Tri-Action pull flings the hammer back. Then after that, you get the normal SA pull. It's not lighter. It's exactly the same. In fact, if you back off a shot after the hammer flings back, the gun is now in the same state as if cocked for SA. The hammer remains cocked and the trigger returns to the normal SA position.
Also, you can manually recock... errr, reposition the hammer to change from the Tri-Action state back to SA, and the trigger moves back to SA position.
If I understand right, there is NO de-cocking action, only a strange function that allows the hammer to be pushed forward (to prevent snags? To use with belly band holsters? Why?)
AFAIC, the tri-action pull is similar to a DA pull, except it's lighter and it "stacks" at the end, where it breaks just like the SA shot (with the very short reach and at a relatively heavy 8 lbs or so).The normal DA pull is almost just as light, but the break point is a farther reach. So the main advantages are having a "DA pull" that's consistent with the following SA shots, and the shorter reach* needed to break the trigger compared to a traditional DA pull. I personally think the tri-action mode trigger pull is long and heavy enough on my example to carry unlocked, btw. But for that matter, it's probably safe to carry fully cocked and unlocked - which isn't a screaming endorsement of the SA pull weight!
Also, you can cover the hammer while holstering and make use of holsters with conventional retaining straps that lock under the hammer spur, even while cocked.
*This short trigger reach is what sorta ruins the fun for me. Even though it's a double-stack with a pretty meaty grip, the trigger reach is way too short for my taste.
